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Problem 3. From the equation 2x + 9x 10, what number should be added to make it a perfect quadratic trinomial? A. 81 16 B." D. 4. In the equation 2x - 8x = 0, what value of x will make the cquation equal to zero? A.x = 2 & x =4 B. x= 0 & x= -4 Cx= 4&x= -2 D.x = 0& x = 4 5. How many solutions does the quadratic equation x $+5x+7=$ 0? A. 0 B. 1 C. 2 D. 3 6. What are the roots of the quadratic equation x +x- 56 = 0? A. 8 & 7 B. -8 & - 7 C. -8 & 7 D. B& -7 7. The length of a garden is Sm longer than its width and the area is 14m2. How long is the garden? A. 12 m B. 7 m C. 4 m D. 2 m 8. What is the equivalent equation of (x+ $n\left(x-7=-3x$ A. x + 3x - 49 = 0 B. $-3x$ - 49 = 0 +49 0 D. x* + 3x +49 = 0 - the -3x D. 8 & -7 9. What are the roots of the given quadratic equation (2x square. A. -8 &7 B. -8 & -7 $c+$ $a^{c}2^{4}$ 10. What is the value of x in the quadratic equation 3(3x - A. 20 B. 18 D. 9 11. The equation x - 4x - 4 0 can be solved by completing What constant term should be added to make the left side of the equation a perfect square trinomial? A. 4 B 2 C. D. 12. What are the values of x in the equation x - 2x = 3, using completing the square? D. x = 1& x= -1 Ax= 4 & x = 3 B. x= 3 &x= -1 C.x= 2 & x = 1 13. Which of the following is the discriminant? C-b + 4ac D. b - 4ac A. -b -4ac B. b + 4ac 14. What is the value of the discriminant of the equation x + 5x + 4 = 0? D. 12 A 6 B. 8 C. 9 15. What is the nature of the roots of the quadratic equation if the value of the discriminant is positive but not a perfect square? A. The roots are not real C. The roots are rational and not equal B. The roots are irational and not equal D. The roots are rational and equal 16. When b - 4ac is less than zero the roots are? A Not real C. Irrational and not equal B. Real and not equal D. Rational 17. What is the product of the roots of the quadratic cquation x +3x +2 = a0n7 d equal A. -2 B.-1 C. 2 D. 3 18. What is the sum of the roots of the quadratic equation x + 3x + 2 = 0 A -3 B. -2 C. -1 1 19. Find the quadratic equation with integral coefficients as roots: xDD, . . = -4, x, = 2 A. x - 2x +8 = 0 B. x + 2x -8 numbers $x^{2}-2x$ -8 = 0 equation = 0 having itn he the 20. Find the sum of the roots of the equation 2x $ng$ $+ax+10=0^{Cx2+2x+}$ $c-5$ $o$ $ingn$ $mb$ $sh$ $ng$ $cx^{2}+2x+8=0$ $+10=0$ $c-5$ $ain$ $6omax^{2}+bx$ A -7 B. -6 D. -4 21. Write the given equation = 7 to a quadratic $bx+c$ = 0. A. 3x + 14x - 4= 0 B. 3r - $14x-4=0$ 22. Transform the given equation (x+ 6)² %3D equation $D3x^{2}+14x+4=0$ $\bar{n} ^{14}s^{x+4}=0$ $i$ $o$ $m$ $a$ $x^{2}+bx+c=0$ $0x^{2}+12x-21=0$ $12x+21=0$ A.x - $12x+21$ 0 B. x - 12x $510a9asd$ $i$ $\dfrac {1} {1}21=0$ $0\right)=-21$ 23, Find the solution set of the equation x(x $4x=-78x$ = 3 B. x = 7&x = 3 $Cx=78x=-3$ $D.x=-78x=-3$ A The leneth of a car park is 120 m longer than its width. The area of the car park $s6400m^{2}$ What equation represents the Shot on Y91 vivo dual camera $C$ $x\left(x+120\right)=6400$ $D.x\left(x+120\right)=-640$
7th-9th grade
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Solution Qanda teacher - Lokesh  