Question

Use complete the square, factoring or quadratic formula to complete the following.
2x^2-3=125

Answer 1

\[\begin{aligned}2x^2 - 3 & = &125 \\ 2x^2 & = & 125 + 3\\ x^2& = & 128\div 2 \\ x^2 - 64& =&0 \\ (x + 8)(x - 8)&=&0\end{aligned}\]

Answer 2

Which method did you use

Answer 3

Look carefully through the steps.

Answer 4

Completing the square?