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Popular >

expand (7x+9)^2

Solution

expand

(7 x + 9)^{2}

Solution

49 x^{2} + 126 x + 81

Solution steps

(7 x + 9)^{2}

Apply Perfect Square Formula:

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

(7 x + 9)^{2} = (7 x)^{2} + 2 \cdot 7 x \cdot 9 + 9^{2}

= (7 x)^{2} + 2 \cdot 7 x \cdot 9 + 9^{2}

Simplify

(7 x)^{2} + 2 \cdot 7 x \cdot 9 + 9^{2} : 49 x^{2} + 126 x + 81

= 49 x^{2} + 126 x + 81

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Frequently Asked Questions (FAQ)

What is expand (7x+9)^2 ?
The solution to expand (7x+9)^2 is 49x^2+126x+81