Question

The value of p(x) = 5x - 4x2 +3 for x = -1

Answer 1

Step-by-step explanation:

p(x)=5x-4x^2+3

p(x)=-4x^2+5x+3

where,x=-1

putting the value of x=-1

p(x)=-4x^2+5x+3

p(x)=-4(-1)^2+5(-1)+3

p(x)=-4×1+(-5)+3

p(x)=-4-5+3

p(x)= -9+3

p(x)= -6

Answer 2

The value of p(x) = 5x - 4x² + 3 for x = - 1 is - 6

Given :

The polynomial p(x) = 5x - 4x² + 3

To find :

The value of p(x) = 5x - 4x² + 3 for x = - 1

Solution :

Step 1 of 2 :

Write down the given polynomial

The given polynomial is

p(x) = 5x - 4x² + 3

Step 2 of 2 :

Find the required value

p(x) = 5x - 4x² + 3

$\displaystyle \sf{ \implies p( - 1) = 5 \times ( - 1) - 4 \times {( - 1)}^{2} + 3 }$

$\displaystyle \sf{ \implies p( - 1) = - 5 - 4 + 3 }$

$\displaystyle \sf{ \implies p( - 1) = - 6 }$

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