What is (-3)^2-4(1)(-18) ?

The solution to (-3)^2-4(1)(-18) is 81

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

(-3)^2-4(1)(-18)

(- 3)^{2} - 4 (1) (- 18)

81

Solution steps

(- 3)^{2} - 4 (1) (- 18)

Follow the PEMDAS order of operations

Calculate exponents

(- 3)^{2} : 9

(- 3)^{2}

Apply exponent rule:

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

n

is even

(- 3)^{2} = 3^{2} = 9

= 9

= 9 - 4 (1) (- 18)

Multiply and divide (left to right)

4 (1) (- 18) : - 72

4 (1) (- 18)

4 (1) = 4

4 (1)

Apply rule:

(a) = a

(1) = 1

= 4 \cdot 1

Multiply the numbers:

4 \cdot 1 = 4

= 4

= 4 (- 18)

Apply rule

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

4 (- 18) = - 4 \cdot 18 = - 72

= - 72

= 9 - (- 72)

Add and subtract (left to right)

9 - (- 72) : 81

9 - (- 72)

Apply rule

- (- a) = + a

- (- 72) = + 72

= 9 + 72

9 + 72 = 81

= 81

= 81

3 (- 3)^{2} - 8 (- 3) - 3

33 \cdot (- 1) + 30

- 4 + 9 + 4

3 (3)^{2} - 5 (3) - 6

(- 3) + (- 7) - (- 2) + (- 3)