Question

PLEASE HELP!!!!
Simplify the expression and find its value: (x–10)^2–x(x+80) for x=0.97

Answer 1

The value of given expression is 3

Solution:

Given that we have to simplify the given expression and find its value when x = 0.97

Given expression is:

`(x - 10)^2 - x(x + 80)`

Multiply "x" with terms inside bracket

`\rightarrow (x-10)^2-x^2-80x`

Substitute x = 0.97

`\rightarrow (0.97-10)^2-(0.97)^2-80(0.97)\\\\\rightarrow (-9.03)^2-0.9409 - 77.6\\\\\rightarrow 81.5409 - 0.9409 - 77.6\\\\\rightarrow 80.6 -77.6 = 3`

Thus value of given expression is 3