factorise 4x²-36
please answer fast
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Answer:
(x + 3) (x - 3)
Step-by-step explanation:
The difference of squares identity can be written:
4x² - 36
= (2x)² - (6)²
= (2x + 6) (2x - 6)
= 2 (x + 3) 2 (x - 3) [Taking 2 common]
= (x + 3) (x -3)
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