Question

Express 2x^2-12x-7 in the form a(x+b)^2+c

Answer 1

2(x - 3)^2 - 25.

Explanation:

2x^2-12x-7

= 2(x^2 - 6x) - 7

= 2[(x - 3)^2 - 9] - 7

= 2(x - 3)^2 - 18 - 7

= 2(x - 3)^2 - 25.