Question

If x = -2 is the root of the quadratic equation
x2-3x-a=0, then the value of 'a' is
1.-10
2. 3
3. 10
4.-3​

Answer 1

(-2)2 -3 × -2 -a = 0

4 + 6 - a = 0

10 = - a

a = -10

a is bigger than 0 ( so real roots exist).

Step-by-step explanation:

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