BD Merit - Freelancing, BCS, Bank, Primary, Admission, NTRCA

1 . 3x2+x-10

A. 3x+5
B. x+2
C. $x^{2} + 2$
D. $x^{2} - 2$

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Answer: Option B

Explanation:

3x^2 + x -10

= 3x^2 + 6x - 5x -10

= 3x(x+2) - 5(x+2)

=(x+2)(3x-5)

2 . 3x2+x-10

A. (x + 2) (3x - 5)
B. (3x + 2) (x - 5)
C. (x - 2) (3x + 5)
D. (3x - 2) (x + 5)

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Answer: Option A

Explanation:

3 x^{2} + x - 10 = 3 x^{2} + 6 x - 5 x - 10 = 3 x (x + 2) - 5 (x + 2) = (x + 2) - (3 x - 5)