Question

(4+2x) (5-x) please answer fast
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Answer 1

Answer:

(4+2x) (5-x)

(6x) (5-x)

6x ×5-x

30x-x

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

$(4 + 2x)(5 - x) \\ = 20 + ( - 4x) + 10x + ( - 2 {x}^{2} ) \\ 20 - 4x + 10x - 2 {x}^{2} \\ - 2 {x}^{2} - 6x + 20 = 0 \\ - 2( {x}^{2} + 3x - 10) = 0 \\ {x}^{2} + 3x - 10 = 0 \\ {x}^{2} + 5x - 2x - 10 = 0 \\ x(x + 5) - 2(x + 5) = 0 \\ (x + 5)(x - 2) = 0 \\ x + 5 = 0 \: or \: x - 2 = 0 \\ x = -5 \: \: or \: \: x = 2$