Question

Simplify(10+x-5)(10+x-5)

Answer 1

Take a coman.
10(10+x-5) +x (10+x-5) - 5(10+x-5)
=100+10x-50+10x+x^2-5x-50-5x+25
=(100-50-50+25) + (10x+10x-5x-5x) + x^2
=25+10x+x^2.
Hope it helps.^_^

Answer 2

$(10 + x - 5)(10 + x - 5) =( x + 5)(x + 5) \\ = ( x + 5)^{2} \\ using \: identity = > (a + b ) ^{2} = a^{2} + b^{2} + 2ab \\ = (x)^{2} + (5)^{2} + 2(x)(5)\\ = x ^{2} + 25 + 10x \\ = x ^{2} + 10x + 25$