Question

Evaluate the expression if a=2, b=6, and c=-3. Simplify your answer.

a2−c+2b

Answer 1

19

Explanation:

Since this expression cannot be simplified any further, all we have to do is plug in the values of the variables and calculate the expression.

If a = 2, then a^2 = 4.

The use of the variable c is not modified by any expression, so we just plug in -3.

If b = 6, then 2b = 12.

Therefore:

`a^2-c+2b = 2^2 - (-3) + 2*6 = 4 + 3 + 12 = \boxed{19}`

Answer 2

19

Explanation:

replace the variables with their values.

(2)*2-(-3)+2*(6)

double negative=positive

(2)*2+3+2*(6)

4+3+12

7+12

19