Mathematics, 17.02.2020 21:07 bankskry
Srael started to solve a radical equation in this way: square root of x plus 6 โ 4 = x square root of x plus 6 โ 4 + 4 = x + 4 square root of x plus 6 = x + 4 (square root of x plus 6)2 = (x + 4)2 x + 6 = x2 + 8x + 16 x + 6 โ 6 = x2 + 8x + 16 โ 6 x = x2 + 8x + 10 x โ x = x2 + 8x + 10 โ x 0 = x2 + 7x + 10 0 = (x + 2)(x + 5) x + 2 = 0 x + 5 = 0 x + 2 โ 2 = 0 โ 2 x + 5 โ 5 = 0 โ 5 x = โ2 x = โ5 Solutions = โ2, โ5 What error did Israel make?
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Srael started to solve a radical equation in this way: square root of x plus 6 โ 4 = x square root o...
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