find the sum using column method 7a + 2b and 3a + 4b
Answers
Answered by
1
Answer:
10a+6b
Step-by-step explanation:
7a+2b
3a+4b
______
10a+6b
Answered by
4
Step-by-step explanation:
(7a+2b)(3a+4b)
=(a^2+b^2)
7a×3a+7a×4b=21a+28ab=49a^2b
2b×3a+2b×4b=6ab+8b=14ab^2
=(49ab+14ab) ^2
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