If B = x − 4 + x 2 B=x−4+x 2 and A = 2 + x 2 , A=2+x 2 , find an expression that equals 3 B − 3 A 3B−3A in standard form.

Question

I need it in standard form

Answer 1

A = 2 + x² and B = x - 4 + x²

3B - 3A = 3(x - 4 + x²) - 3(2 + x²) = 3x - 18