Question

How do you factor 4(x2)−28x+49?

Answer 1

Answer:

Step-by-step explanation:

4x^2 -28x +49 = [2x]^2 - 2[2x][7] + [7]^2

                        = [2x -7]^2 = [2x-7] [2x- 7]

Answer 2

Heya Mate

Using Identity = (a-b)²

$4 {x}^{2} - 28x + 49 \\ \\ = \geqslant (2x) {}^{2} - 2 \times 2x \times 7 + (7) {}^{2} \\ \\ = \geqslant (2x - 7) {}^{2} \\ \\ = \geqslant (2x - 7) \: (2x - 7)$