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Question

Find the zeros of the following quadratic polynomials 6x2-3-7x and verify the relationship between the zeros and the coefficients.


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Solution

Step 1: Form the equation

The given polynomial is 6x2-3-7x.

We know that the zeroes of a polynomial are evaluated by equating them with zero.

px=0

6x2-7x-3=0

Step 2: Solve to find the zeroes

6x2-7x-3=0

6x2-9x+2x-3=0

3x2x-3+12x-3=0

2x-33x+1=0

x=32,-13

Step 3: Verification

We know that for a given polynomial ax2+bx+c,

Sum of the zeroes=-ba and product of the roots=ca

Sum of the zeroes =32-13=9-26=73

Again, -ba=--76=73

Product of the zeroes =32×-13=-36=-12

Again, ca=-36=-12

Thus, the relationship between the zeroes and the coefficients of the polynomial is verified.

Hence, the zeroes of this polynomial are 32 and -13.


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