Question

(5+x)²+(x-3)(x+3)-2x²
(5/✓18+3/4✓2-7/✓72):15/8✓2

Answer 1

[tex]\left(5+x\right)^2+\left(x-3\right)\left(x+3\right)-2x^2 \\ \left(5+x\right)^2+\left(x-3\right)\left(x+3\right)-2x^2 \\ =25+10x+x^2+\left(x-3\right)\left(x+3\right)-2x^2 \\ \\ =25+10x+x^2+x^2-9-2x^2 \\ \\ =10x+16[/tex]