Question

(4x-7)(x+4)-(3x+8)(5x-8) simplifyjain 35jai@@​

Answer 1

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$(4x-7)(x+4)-(3x+8)(5x-8) \\ \\ 4x(x+4) - 7(x+4) - [3x(5x-8) + 8(5x-8) ] \\ \\ 4 {x}^{2} + 16x - 7x - 28 - [15 {x}^{2} - 24x + 40x - 64] \\ \\ 4 {x}^{2} + 9x - 28 - [15 {x}^{2} + 16x - 64] \\ \\ 4 {x}^{2} + 9x - 28 - 15 {x}^{2} - 16x + 64 \\ \\ 4 {x}^{2} - 15 {x}^{2} + 9x - 16x - 28 + 64 \\ \\ - 11 {x}^{2} - 7x + 36\\ \\ =\: 11 {x}^{2} + 7x - 36$

Answer 2

Answer:

-39x² +12x -92

1. (4x-7)(x+4)-(3x+8)(5x-8)

= 4x²+16x - 7x² -28 - 15x² - 24x + 40x - 64

= -39x² + 12x - 92

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