#15 Help.
√ [ 7x ] ( √x - 7√7 ) =
(We are just using the distributive property here, like normal )
√ [7x] * √x - √ [7x] * 7√ 7 =
√ [ 7 * x^2 ] - 7√ [ 7x * 7 ] =
x√ 7 - 7 √ [49 x ] =
x √7 - 7 * 7√ x =
x√7 - 49√x
