Question

find the product of : (5x+4)(2x-4)​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

$(5 x+ 4)(2x - 4) \\ 10x {}^{2} - 20x + 8x - 16 = 0 \\ 10x {}^{2} - 12x - 16 = 0 \\ 2(5x {}^{2} - 6x - 8) = 0 \\ 5x {}^{2} - 6x - 8 = 0 \\ 5x {}^{2} - (10x - 4x) - 8 =0 \\ 5x {}^{2} - 10x + 4x - 8 = 0 \\ 5x(x - 2) + 4(x - 2) = 0 \\ (x - 2)(5x + 4) = 0 \\ x = 2 \: \: \: and \: \: \: \frac{ - 4}{5}$

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