Question

二次函数配方二次函数一般形式配方、我给忘了、y=2x^2+4x-6y=2x^2+4x、 急用、谢谢.

Answer 1

y=2x²+4x-6

=2x²+4x+2-2-6

=2(x²+2x+1)-8

=2(x+1)²-8

y=2x²+4x

=2x²+4x+2-2

=2(x²+2x+1)-2

=2(x+1)²-2