Question

Find the value of given equation 4x²--3x+12 if x=-3​

Answer 1

Answer:

We have,

f(x)=x

3

−4x

2

−3x+12.

Let α=

3

,β=−

3

be the given zeros and γ be the third zero.

Then,

α+β+γ=−(

1

−4

).

Using [α+β+γ=−

coeff.ofx

3

coeff.ofx

2

]

⇒

3

−

3

+γ=4,

⇒γ=4

Hence, third zero is

Answer 2

Answer:

4x²-3x+12

x=-3

=>4(-3)²-3(-3)+12

=>4×9+9+12

=>36+9+12

=>57

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