Question

For what values of x does -x2 +7x + 5 = 0

Answer 1

Explanation:

To find the value of x in -x^2+7x+5=0

Multiply through by -1

x^2-7x-5=0

Usinng formulate method

We get

-b+or-√b^2-4ac over 2a

7+ or -√-7^2-4×1×-5 over 2×1

7+ or -√49+20/2

7+or -√69/2

7+8.3/2 or 7-8.3/2

7.7 or -0.65