3x^2 + x – 10কে উৎপাদকে বিশ্লেষন করুন ।

A    (x-2)(3x-5)

B    (x+2)(3x-5)

C    (x+2)(3x+5)

D    (x-2)(3x+5)

Solution

Correct Answer: Option B

 

এখানে, 3 ×(-10) = -30

এখন, (-5)×6 = -30এবং (-5) + 6 = 1

∴3x^2 + x – 10 = 3x^2 + 6x – 5x -10

            =3x (x+2) – 5(x+2)

            =(x+2) (3x-5)

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