Question

(a+3)^2+(a-4)(5-a) если a=-0.5

Answer 1

Ответ:

-18,5

Объяснение:

(-0,5+3)^2+(-0.5-4)(5-(-0.5))=2.5^2+(-4.5)*5.5= 6.25+(-24.75)=-18.5

Answer 2

To simplify the given expression $(a+3)^2 + (a-4)(5-a)$ when $a = -0.5$, you can substitute the value of $a$ into the expression and then perform the calculations:

Given expression: $(a+3)^2 + (a-4)(5-a)$

Substitute $a = -0.5$: $(-0.5 + 3)^2 + (-0.5 - 4)(5 - (-0.5))$

Calculate each term: $(2.5)^2 + (-4.5)(5.5)$

Perform the calculations: $6.25 + (-24.75)$

Finally, add the terms: $6.25 - 24.75 = -18.5$

So, when $a = -0.5$, the value of the expression $(a+3)^2 + (a-4)(5-a)$ is $-18.5$.