7x + 7 = 7(x + 1)
(7x - 10)(x + 1)
It appears there might be some confusion in your notation or expression. To factor 7x - 14x, you can first factor out the common factor, which is 7x. Here's how you do it: 7x - 14x = 7x(1 - 2) Now, the common factor of 7x has been factored out, and you're left with 1 - 2 inside the parentheses. So, the expression 7x - 14x can be simplified to: 7x(1 - 2) Now, it's clear that the width of Yun's area model is 1 - 2, which is equal to -1. So, the width of Yun's area model is -1.
7(x + 1)
6x2 + 7x - 5 = (3x + 5)(2x - 1)
(10x + 3)(x - 1)
1
x2 + 7x + 6 = (x + 6) (x + 1)
7x(3x3 - 2x2 + 5x + 1)
The factorisation is as follows: 2x2 + 7x - 9 = (x - 1)(2x + 9).
(3x - 2)(5x + 1)
(7x + 4)(x - 1)