7x^2+4x-20=0 solve this question by factorization method
Answers
Answered by
5
Step-by-step explanation:
7x^2+4x-20
=7x(x+2)-10(x+2)
=(x+2)(7x-10)
Answered by
2
Answer:
x = – 2 or x = 10/7
Step-by-step explanation:
7x2 + 4x – 20 = 0
∴ 7x2 + 14x – 10x – 20 = 0
∴ 7x (x + 2) – 10 (x + 2) = 0
∴ (x + 2) (7x – 10) = 0
∴ x + 2 = 0 or 7x – 10 = 0
∴ x = – 2 or 7x = 10
∴ x = – 2 or x = 10/7
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