−1 is a root of the quadratic equation x2+3x−4=0
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no
Step-by-step explanation:
when we substitute -1 in place of x we should get 0. Then -1 is said to bet the root of the quadratic equation.
(-1)^2 + 3(-1) -4
1 -3 -4
-2-4 = -6
thus -1 is not a root of the quadratic equation
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