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Popular >

expand (-3x+7)^2

Solution

expand

(- 3 x + 7)^{2}

Solution

9 x^{2} - 42 x + 49

Solution steps

(- 3 x + 7)^{2}

Apply Perfect Square Formula:

(a + b)^{2} = a^{2} + 2 ab + b^{2}

(- 3 x + 7)^{2} = (- 3 x)^{2} + 2 (- 3 x) \cdot 7 + 7^{2}

= (- 3 x)^{2} + 2 (- 3 x) \cdot 7 + 7^{2}

Simplify

(- 3 x)^{2} + 2 (- 3 x) \cdot 7 + 7^{2} : 9 x^{2} - 42 x + 49

= 9 x^{2} - 42 x + 49

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Frequently Asked Questions (FAQ)

What is expand (-3x+7)^2 ?
The solution to expand (-3x+7)^2 is 9x^2-42x+49