Which is the completely factored form of 4x2 28x 49


Asked by maham237 @ in Mathematics viewed by 493 People


O
(x + 7)(4x + 7)
4(x + 7)(x + 7)
(2x + 7)(2x + 7)
2(x+7)(x + 7)

Answered by maham237 @



Answer:

(2x + 7)(2x + 7)

Step-by-step explanation:

4 {x}^{2}  + 28x + 49 \\  = 4 {x}^{2}  + 14x + 14x + 49 \\  = 2x(2x + 7) + 7(2x + 7) \\  = (2x + 7)(2x + 7)


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