Question

Ayuda plis lo más rápido posible

Answer 1

$(y-3)(y-6)=y^{2} -9y+18\\(3x-7)(3x+12)=9x^{2} +15x-84\\(2x+1)(2x-1)=4x^{2} -1\\(x-5)(x-5)+(x-2)(x-2)+(x+3)(x-8)=x^{2} -10x+25+x^{2} -4x+4+x^{2} -5x-24=3x^{2} -19x+5$

$(x^{2}+x+1)(x^{2} +x+1) =x^4+x^{3} +x^{2} +x^{3}+ x^{2} +x+x^{2} +x+1=x^4+2x^{3}+ 3x^{2} +2x+1\\\frac{10a^{5} b^{4}c} {-2a^{3} bc}=-5 a^{2} b^{3} \\\frac{4x^{3}-8 x^{2}-12x+20} {2x^{2}} =2x-4- \frac{6}{x}+ \frac{20}{x^{2}}$

Saludos..