2x2 + 21x + 49 = 2x2 +14x +7x + 49 = 2x(x + 7) + 7(x + 7) = (2x + 7)(x + 7)
2x2 + 21x + 49= 2x2 + 14x + 7x + 49= 2x(x + 7) + 7(x + 7)= (x + 7)(2x + 7)
x2+14x+49 = (x+7)(x+7) when factored
d/dx 2x2+3x+7=4x+3
x=7
2x2 + 21x + 49 = 2x2 +14x +7x + 49 = 2x(x + 7) + 7(x + 7) = (2x + 7)(x + 7)
2x2 + 21x + 49= 2x2 + 14x + 7x + 49= 2x(x + 7) + 7(x + 7)= (x + 7)(2x + 7)
(x2 + 14x + 49) = (x + 7)2
14x+12y+7 This expression cannot be simplified any further.
3x/7 + 5y/14x = 3x*2x/(7*2x) + 5y/14x = (6x2 + 5y)/14x
x2 - 14x + 49(x - 7) (x - 7)
x2+14x+49 = (x+7)(x+7) when factored
d/dx 2x2+3x+7=4x+3
2x2 equals 5
x=7
4x2 + 28x + 49 = 4x2 + 14x + 14x + 49 = 2x(2x + 7) + 7(2x + 7) = (2x + 7)(2x + 7) or (2x + 7)2
x2 - 14x + 49 = (x - 7)2