[latex](x-2)(x+2)+(x+5)(x-5)=\=x^2+2x-2x-4+x^2-5x+5x-25=2x^2-29[/latex]

(x-2)(x+2)+(x+5)(x-5)= x²-2x+2x-4+x²+5x-5x-25= x²-4+x²-25=2x²-29