Q11 of 25 Page 2

If and x = ‒3 are the roots of the quadratic equation ax2 + 7x + b = 0 then find the values of a and b. (CBSE 2011)

We have, ax2 + 7x + b = 0

Now, Sum of zeros



∴a = 3 (i)


Product of zeroes (From i)


∴b= -6

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