Identify the zeros of each quadratic function. $1\right)$ $y$ $2\right)$ $4y$ $10$ $x$ $35-30$ $30-2$ $-20-15$ $0$ $10$ -5 $10$ 15 $-2$ $-1-1$ $-104$ $15$ $-20$ $225$ $2er05$ $zero5:$

Find all the zeros of the quadratic function. $y=x^{2}+9x+20$

Practise $1.$ Find the zeros of each quadratic relation. b) $y=9\left(x-2\right)\left(x+1\right)$ $1\right)$ $y=\left(x+10\right)\left(x-1\right)$ $2.$ Express each quadratic relation in intercept $2$ $y=3x^{2}+27x-108$ a) $\right)$ $y=x^{2}-x-42$ $3$ Find the $zcros$ of each quadratic relation. $0\right)$ $y=4x^{2}+12x-72$ a) $a\right)$ $y=x^{2}+4x-45$ $c\right)$ $y=2x^{2}-288$ d) $y=2.75x^{2}-11x-88$