factorise.... plz help
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12x2−7x−5
=12x2−12x+5x−5
=(12x2−12x)+(5x−5)
=12x(x−1)+5(x−1)
=(12x+5)(x−1)
=12x2−12x+5x−5
=(12x2−12x)+(5x−5)
=12x(x−1)+5(x−1)
=(12x+5)(x−1)
Answered by
1
Step-by-step explanation:
12x^2 -17x-5 = 0
x^2 -17/12x = 5/12
(1/2 × coeff of x)^2
(1/2 × 17/12)^2
(17/24)^2
289/576
x^2 -17/12x + 289/576 = 5/12 + 289/576
You may observe first part as perfect square.
solve futher and get your answer
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