125x3 + 1 ???????? 53 * x3 + 1 ================?????
40
32
89
( 6 + 6 ) + ( 6 + 8 ) + ( 5 + 8 ) = 39
no
(5x - 2)(25x^2 + 10x + 4)
125x3 + 1 ???????? 53 * x3 + 1 ================?????
125x3+343y3 can also be written (5x)3+(7y)3. It helps to rewrite the constants like this because there is a general factoring rule: a3+b3 = (a+b)(a2-ab+b2). In this example, the a is 5x and the b is 7y. Plug in and get (5x+7y)(25x2-35xy+49y2).
(5x + y)(25x^2 - 5xy + y^2)
the answer is 56
8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 = 72
56
Another way to write that is 8x8. The answer is 64.
8 plus 8 plus 8 plus 88 plus 888 = 1000
125x3, because you have to times the x too. So it's like (5x)(5x)(5x) and what do you get? 125x3!!
40