(X-2)(X+3)+3x+10

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(X-2)(X+3)+3x+10(X-2)(X+3)+3x+10(X-2)(X+3)+3x+10(x-2)(x+3)+3x+10=x^2+x-6+3x+10=x^2+4x+4=(x+2)^2

(X-2)(X+3)+3x+10
(X-2)(X+3)+3x+10

(X-2)(X+3)+3x+10
(x-2)(x+3)+3x+10
=x^2+x-6+3x+10
=x^2+4x+4
=(x+2)^2