Question

Find the value of the expression: 100 – 10x3 + 5x2 at x = -4

Answer 1

Answer:

The value of the expression at x=-4 is 820

Step-by-step explanation:

Given the expression,

$100-10x^3+5x^2$

To find the value at $x=-4$, we should substitute -4 in place of $x$ in the given expression. We shall calculate the value of each term in the expression.

$10x^3=10\times (-4)^3=10\times(-64)=-640$

$5x^2=5\times(-4)^2=5\times 16= 80$

So, the value of the expression is

$100-(-640)+80=100+640+80=820$.

Answer 2

Given expression is, 100 - 10x³ + 5x² , x = -4 .

to find : value of given expression

solution :

➻ 100 - 10(-4)³ + 5(4)²

➻ 100 - 10(-64) + 5(16)

➻ 100 + 640 + 80

➻ 820