2x²-13x-189=0 value of x
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Answer:
27/2 or -7
Step-by-step explanation:
We can easily find the value of x by determinant method.
D = -(-13) ± √[(-13)^2 - 4*2*(-189)]
-----------------------------------------
2*2
= 13 ± √(169 + 1512)
--------------------------
4
= (13 ± 41)/4
= 54/4 OR -28/4
= 27/2 OR -7
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