Factories, splitting the middle term: 4x²- 4x-15
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Answered by
0
Answer:
4x^2 - 4x - 15
= 4x^2 - 10x + 6x - 15
2x (2x-5) +3 (2x-5)
(2x-5) (2x+3)
Step-by-step explanation:
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Answered by
14
Answer:
Given :-
➪ 4x² - 4x - 15
Solution :-
➪ 4x² - 4x - 15 = 0
➭ 4x² - (10 - 6)x - 15 = 0
➭ 4x² - 10x + 6x - 15 = 0
➭ 2x(2x - 5) + 3(2x - 5) = 0
➭ (2x - 5) (2x + 3) = 0
➭ (2x - 5) = 0
➭ 2x - 5 = 0
➭ 2x = 5
➭ x = 5/2
Either,
➭ (2x + 3) = 0
➭ 2x + 3 = 0
➭ 2x = - 3
➭ x = - 3/2
∴ The value of x is 5/2, - 3/2
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