Mathematics, 17.10.2019 01:00 edith47
Israel started to solve a radical equation in this way: square root of x plus 6 − 4 = x square root of x plus 6 − 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 − 6 = x2 8x 16 − 6 x = x2 8x 10 x − x = x2 8x 10 − x 0 = x2 7x 10 0 = (x 2)(x 5) x 2 = 0 x 5 = 0 x 2 − 2 = 0 − 2 x 5 − 5 = 0 − 5 x = −2 x = −5 solutions = −2, −5 what error did israel make?
Answers: 3
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Israel started to solve a radical equation in this way: square root of x plus 6 − 4 = x square root...
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