What is (-8)^2-4*2*9 ?

The solution to (-8)^2-4*2*9 is -8

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(-8)^2-429

(- 8)^{2} - 4 \cdot 2 \cdot 9

- 8

Solution steps

(- 8)^{2} - 4 \cdot 2 \cdot 9

Follow the PEMDAS order of operations

Calculate exponents

(- 8)^{2} : 64

(- 8)^{2}

Apply exponent rule:

(- a)^{n} = a^{n},

n

is even

(- 8)^{2} = 8^{2} = 64

= 64

= 64 - 4 \cdot 2 \cdot 9

Multiply and divide (left to right)

4 \cdot 2 \cdot 9 : 72

4 \cdot 2 \cdot 9

4 \cdot 2 = 8

= 8 \cdot 9

8 \cdot 9 = 72

= 72

= 64 - 72

Add and subtract (left to right)

64 - 72 : - 8

64 - 72

64 - 72 = - 8

= - 8

= - 8

5 \times (7 - 4) + \frac{9}{3} (4) - 16

\frac{16}{3} (- 1) - \frac{79}{3}

+ 4 \times 5 - (28 \div 2) \div 2 + 16

\frac{3 ( - 2 ) ( 3 ) - 2 ( - 1 ) ( 2 )}{4 ( - 2 ) ( - 1 )}

- 2 (- 4) + 1