Question

FACTORISE:
(3x square + 4x - 20 ) by (x - 2)​

Answer 1

Answer:

x-2 is a factor of 3x² + 4x - 20

Step-by-step explanation:

Let 'x' be

x - 2 = 0

x = 2

f(2) = 3(2)² + 4(2) - 20

12 + 8 - 20

20 - 20 = 0

:. x-2 is a factor of 3x² + 4x - 20

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Answer 2

Answer:

(3x+10)

Step-by-step explanation:

$3x {}^{2} + 4x - 20 \div x - 2 \\ factorice \: 3x {}^{2} + 4x - 20 \\ = 3x {}^{2} + 10x - 6x - 20 \: \\ here \: 4x \: we \: wrote \: as \: 10x - 6x. \\ = x(3x + 10) - 2(3x + 10) \\ = (x - 2)(3x + 10) \: are \: factors \: \\ solve \\ (x - 2)(3x + 10) \div (x - 2) \\ = x - 2 \: wil \: be \: cancelled. \\ = (3x + 10)$