Question

If A = 3 a²-2a+7 ,B= 2a²+4a+1 find :- A+B , A-B , 2A + 2B​

Answer 1

Step-by-step explanation:

A=3a^2-2a+7

B=2a^2+4a+1

A+B

=3a^2-2a+7+2a^2+4a+1

=5a^2+2a+8

A-B

=3a^2-2a+7-2a^2-4a-1

=a^2-6a+6

2(A+B)

=2(5a^2+2a+8)

=10a^2+4a+16

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Answer 2

Answer:

1) A + B = 5a² + 2a + 8

2) A - B = a² - 6a + 6

3) 2A + 2B = 10a² + 4a + 16

Step-by-step explanation:

1) A + B = 3a² - 2a + 7 + 2a² + 4a + 1

= 5a² + 2a + 8

2) A - B = 3a² - 2a + 7 - 2a² - 4a - 1

= a² - 6a + 6

3) 2A + 2B = 2(A + B) = 2(5a² + 2a + 8)

= 10a² + 4a + 16

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