Question

find the roots of the quadratic equation y = 3x2 - 30x + 45 .

Answer 1

factor

Answer 2

remember we have to help her not give her the answer

Answer 3

let's take 3 as common factor

so what we get

y=3(x2-10x+15)

now we will find roots of equation by formula method

x=-b+-sqrt(b^2-4ac)/2a .................(1)


by comparing our quadratic equation x2-10x+15 to standard form ax2+bx+c
we get a=1 b=-10 c=15

now put this values in (1) and get values of x

and put them in to our given equation y=3(x2-10x+15)

Answer 4

thanks wolf923

Answer 5

thanks guys :)

Answer 6

you are most welcome