This is not a difficult factorisation, as it is merely a normal factorisation with "a" stuck on the end of each number. 25a(2) - 20ab + 4b(2) (2b-5a)(2b-5a) This is: 2bx2b=4b(2) 2bx-5a=-10ab (twice) -5ax-5a=25a
The answer is 672.
155
205
350 + 80 + 35 = 465
30ab-13
280
The answer is 350. Simply add the numbers together like you would for two plus two. To check your work, a calculator is the best option.110
Answer = 140
140
This is not a difficult factorisation, as it is merely a normal factorisation with "a" stuck on the end of each number. 25a(2) - 20ab + 4b(2) (2b-5a)(2b-5a) This is: 2bx2b=4b(2) 2bx-5a=-10ab (twice) -5ax-5a=25a
The answer is 672.
155
The answer is 175. Simply add the numbers together arithmetically as you would for the problem two plus two. To check your work, a calculator is the best option.
3,457 plus 35 equals 3,492.
34 plus 1 equals 35
31 plus four is 35.