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Find roots of 4m² + 6m + 2 = 0
Question

Find roots of 4m² + 6m + 2 = 0

A.

12and4-\frac{1}{2} and - 4​​

B.

12and1\frac{1}{2} and 1​​

C.

12and1-\frac{1}{2} and - 1

D.

12and4-\frac{1}{2} and 4

Correct option is C

Given:

Quadratic equation: 4m2+6m+2=0.m^{2} + 6m + 2 = 0.​​

Formula Used:
Quadratic formula m=b±b24ac2a=\dfrac{-b\pm\sqrt{b^{2}-4ac}}{2a}​, for am2+bm+c=0.m^{2}+bm+c=0.​​

Solution:
Here, a = 4; b = 6; c = 2.
Discriminant: Δ=b24ac=624×4×2=3632=4\Delta=b^{2}-4ac=6^{2}-4\times4\times2=36-32=4​​
m =6±42×4\frac{-6\pm\sqrt{4}}{2\times4}​​

=6±28\frac{-6\pm2}{8}​​
Roots:
m=6+28=48=12,=\frac{-6+2}{8}=\frac{-4}{8}=-\frac{1}{2},​​

m=628=88=1=\frac{-6-2}{8}=\frac{-8}{8}=-1​​

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