Use a suitable identity to get each of the following products, 1. (2a – 7) (2a – 7) 2. (6x – 7) (6x + 7)
Answers
Answered by
0
Answer:
- (2a – 7) (2a – 7)
= (2a-7)²
= (2a)²+7²-2ax7
=4a²+49-14a
2. (6x – 7) (6x + 7)
= (6x)²-7²
36x²-49
Answered by
0
Step-by-step explanation:
1.(2a-7) (2a-7)
=2a.2a +2a.(-7)+(-7)2a - 7(-7)
=4a - 14a-14a +49
=4a - 28a+49
2. (6x-7)(6x+7)
=(6x)(6x)+(6x) (7)-7(6x)-7(+7)
=36x² +42x - 42x - 49
=36x² - 49
Similar questions