Question

(3x+3)²+(4x-1)(4x+1)=(5x-1)²
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Answer 1

(a +b)² = a² + 2ab + b²

a² - b² = (a - b)(a + b)

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(3x+3)²+(4x-1)(4x+1)=(5x-1)²

(9x² + 18x + 9) + (16x² - 1) = 25x² - 10x + 1

18x + 10x = 1 + 1 - 9

28x = -7

x = -1/4