The solution to 8-2(-4)+5 is 21

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8-2(-4)+5

Solution

8 - 2 (- 4) + 5

21

Solution steps

8 - 2 (- 4) + 5

Follow the PEMDAS order of operations

Multiply and divide (left to right)

2 (- 4) : - 8

2 (- 4)

Apply rule

a \cdot (- b) = - a \cdot b

2 (- 4) = - 2 \cdot 4 = - 8

= - 8

= 8 - (- 8) + 5

Add and subtract (left to right)

8 - (- 8) + 5 : 21

8 - (- 8) + 5

Apply rule

- (- a) = + a

- (- 8) = + 8

= 8 + 8 + 5

8 + 8 = 16

= 16 + 5

16 + 5 = 21

= 21

= 21

10 + {45 - 3 [(36 + 14) \div 5]}

- 3 \times (- 2) - 2

\frac{1}{3} (3) - 2

(2)^{2} - 5 (2) - 10 + 15

2 \times (5 - 3 + 21 \div 3)^{2}