Question

solve -4x^2-72=0

Answer 1

\(\Large \color{Black}{\Rightarrow -4(x^2 - 18) = 0 }\)
\(\Large \color{Black}{\Rightarrow x^2 - 18 = 0 }\)
\(\Large \color{Black}{\Rightarrow x^2 = 18 }\)
\(\Large \color{Black}{\Rightarrow \sqrt{x} = \pm\sqrt{18} }\)

Answer 2

Oops I meant x...I tend to make mistakes when sat is there

Answer 3

How do you make me so nervous satellite?

Answer 4

WAIT SIRE

Answer 5

\(\Large \color{Black}{\Rightarrow -4(x^2 + 18) = 0 }\)
What have I done?

Answer 6

I fail....shouldn't be 99

Answer 7

x=-+3isqrt2