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Popular >

expand (x+1)(2x+9=0)

Solution

expand

(x + 1) (2 x + 9 = 0)

Solution

2 x^{2} + 9 x = 0

Solution steps

(x + 1) (2 x + 9 = 0)

= (x + 1) (2 x + 9 \cdot 0 =)

Apply FOIL method:

(a + b) (c + d) = a c + a d + b c + b d

a = x, b = 1, c = 2 x, d = 9 = 0

x \cdot 2 x + x \cdot 9 = 0 + 1 \cdot 2 x + 1 \cdot 9 = 0

2 xx + 9 x = 0 + 1 \cdot 2 x + 1 \cdot 9 = 0

Expand

2 xx + 9 x : 2 x^{2} + 9 x

2 x^{2} + 9 x = 0

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Frequently Asked Questions (FAQ)

What is expand (x+1)(2x+9=0) ?
The solution to expand (x+1)(2x+9=0) is 2x^2+9x=0