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Popular >

simplify (7i)(-7i)

Solution

simplify

(7 i) (- 7 i)

Solution

49

Solution steps

(7 i) (- 7 i)

Apply rule:

a (- b) = - ab

(7 i) (- 7 i) = - 7 i 7 i

= - 7 i 7 i

Multiply the numbers:

- 7 \cdot 7 = - 49

= - 49 ii

Apply exponent rule:

aa = a^{2}

ii = i^{2}

= - 49 i^{2}

Apply imaginary number rule:

i^{2} = - 1

= - 49 (- 1)

Multiply the numbers:

- 49 (- 1) = 49

= 49

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Frequently Asked Questions (FAQ)

What is (7i)(-7i) ?
The solution to (7i)(-7i) is 49