Question

al multiplicar (3x+5)(2x-1) y adicionarle x+5, se obtiene:
a)6x^2+5x b)6x^2+4x c)8x^2+7x d)6x^2+8x e) 6x^2

Answer 1

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$= (3x + 5)(2x - 1) + x + 5 \\ = 3x \times 2x + 3x \times ( - 1) + 5 \times 2x + 5 \times ( - 1) + x + 5 \\ = {6x}^{2} - 3x + 10x - 5 + x + 5 \\ = {6x}^{2} + 8x$