Question

Multiply the following:
(i) 5x² - 4x + 1 by 2x² + 3x - 7
​

Answer 1

Step-by-step explanation:

ANSWER:=(5x^2+3x-7)(x-1)-(2x^2+3x-4)(2x-3)=(5x^3+3x^2-7x-5x^2-3x+7)-(4x^3+3x^2-8x-6x^2-9x+12)=(5x^3-2x^2-10x+7)-(4x^3-3x^2-17x+12)=x^3-5x^2-27x+19

Answer 2

$( {5x}^{2} - 4x + 1) \times ( {2x}^{2} + 3x - 7) \\ {5x}^{2} ( {2x}^{2} + 3x - 7) - 4x({2x}^{2} + 3x - 7) + 1({2x}^{2} + 3x - 7) \\ {10x}^{4} + {15x}^{3} - {35x}^{2} - {8x}^{3} - {12x}^{2} + 28x + {2x}^{2} + 3x - 7 \\ {10x}^{4} + {15x}^{3} - {8x}^{3} - {35x}^{2} - {12x}^{2} + {2x}^{2} + 28x + 3x - 7 \\ {10x}^{4} + {7x}^{3} - {45x}^{2} + 31x - 7$

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