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Popular >

simplify (-7x^4)^2

Solution

simplify

(- 7 x^{4})^{2}

Solution

49 x^{8}

Solution steps

(- 7 x^{4})^{2}

Apply exponent rule:

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

if

n

is even

(- 7 x^{4})^{2} = (7 x^{4})^{2}

= (7 x^{4})^{2}

Apply exponent rule:

(a \cdot b)^{n} = a^{n} b^{n}

(7 x^{4})^{2} = 7^{2} (x^{4})^{2}

= 7^{2} (x^{4})^{2}

7^{2} = 49

= 49 (x^{4})^{2}

Apply exponent rule:

(a^{b})^{c} = a^{b c},

assuming

a \geq 0

(x^{4})^{2} = x^{4 \cdot 2}

= 49 x^{4 \cdot 2}

Multiply the numbers:

4 \cdot 2 = 8

= 49 x^{8}

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Frequently Asked Questions (FAQ)

What is (-7x^4)^2 ?
The solution to (-7x^4)^2 is 49x^8