Question

3x2 - 20x -7 = 0
Solve using factorisation method

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Answer 1

Answer:

x = 7, -1/3

Step-by-step explanation:

$3x^{2} - 20x - 7 = 0\\3x^{2} - 21x + x - 7 = 0\\3x(x-7) + 1(x-7) = 0\\(x-7)(3x+1) = 0\\Either,\\x - 7 = 0\\x = 7\\or,\\3x + 1 = 0\\3x = -1\\x = -1/3$