Question

Evaluate the expression for a = 5 and b = 8.
a² + b² - 2ab

Answer 1

`\sf\\Given:\\a=5\ and\ b=8\\\therefore\ a^2+b^2-2ab=5^2+8^2-2(5)(8)=25+64-80=9`

Answer 2

9

Explanation:

In order to evaluate this expression, we are going to plug in the value of each variable.

`\tt{a^2+b^2-2ab}` {our expression}

`\tt{5^2+8^2-2(5)(8)}` {simplify}

`\tt{25+64-80}`

`\tt{9}`

Therefore, the answer is 9.