Question

Find the value of the polynomial 5x-4x²+3 at x=-1.
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Answer 1

✡Hey mate here's ur answer↓↓↓

=>5x-4x²+3

=>5(-1)-4(-1²)+3 [:x=-1]

=>-5-4+3

=>-6

✅Hope it helps u^_^✅

Answer 2

Answer :-

Value of 5x - 4x² + 3 is -6 when x is -1

Given :-

-1 is a factor of the polunomial 5x - 4x² + 3.

To Find :-

Value of the polynomial 5x - 4x² + 3

Solution :-

5x - 4x² + 3 .......[1]

___________[Put value of x in equation 1]

» 5(-1) - 4(-1)² + 3

» -5 - 4(1) + 3

» -5 - 4 + 3

» -9 + 3

» -6

Value of 5x - 4x² + 3 is -6 when x is -1.

Verification :-

5x - 4x² + 3 = -6

Put value of x .

» 5(-1) - 4(-1)² + 3 = -6

» -5 - 4(1) + 3 = -6

» -5 - 4 + 3 = -6

» -9 + 3 = -6

» -6 = -6

L.H.S = R.H.S

Hence, verified