How do you find the zeros by rewriting the function y=4x^2+60x in intercept form?

1 Answer
Sep 2, 2017

x=0,x=-15

Explanation:

"factorise the quadratic"

y=4x(x+15)larrcolor(red)" in intercept form"

"to find zeros let " y = 0

rArr4x(x+15)=0

"now equate each factor to zero and solve for x"

4x=0rArrx=0

x+15=0rArrx=-15

rArrx=0,x=-15" are the zeros"