What is (-1)^2-2(-1) ?

The solution to (-1)^2-2(-1) is 3

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(-1)^2-2(-1)

(- 1)^{2} - 2 (- 1)

3

Solution steps

(- 1)^{2} - 2 (- 1)

Follow the PEMDAS order of operations

Calculate exponents

(- 1)^{2} : 1

(- 1)^{2}

Apply exponent rule:

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

n

is even

(- 1)^{2} = 1^{2} = 1

= 1

= 1 - 2 (- 1)

Multiply and divide (left to right)

2 (- 1) : - 2

2 (- 1)

Apply rule

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

2 (- 1) = - 2 \cdot 1 = - 2

= - 2

= 1 - (- 2)

Add and subtract (left to right)

1 - (- 2) : 3

1 - (- 2)

Apply rule

- (- a) = + a

- (- 2) = + 2

= 1 + 2

1 + 2 = 3

= 3

= 3

2^{2} - 3^{2}

\frac{2 ^{3} \cdot 3 ^{2}}{3 ^{3} \cdot 2}

- 2 \times (- 2) \times (- 2)

- 2 + 10 - 8 \times 9 + 5 \times 4 + 12 \div 4 - 11 \div 1

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