(7a^(2) - 63b^(2)) =?...

`(7a^(2) - 63b^(2)) =`?

A

`(7a-9b) (9a +7b)`

B

`(7a - 9b) (7a + 9b)`

C

`9 (a- 3b) (a+ 3b)`

D

`7 (a - 3b) (a + 3b)`

Text Solution

Verified by Experts

The correct Answer is:

D

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a ^(2) + 2a - 63

Identify like terms in the following: 4ab, 7a, 8b, -3a^(2)b^(2), - 4ba, -50b, - 75, 15b^(2)a^(2), - 7a^(2), 45, 150a, 70ba, 10a^(2)b, - 15ab^(2), 3ba^(2), - 21a^(2), 7b^(2)a .

Knowledge Check

Find the sum of the expresson - 15 a ^(2) + 3 ab - 6b ^(2) a ^(2) - 5 ab + 11 b ^(2) , - 7a ^(2)- 18 ab - 13 b ^(2) and 26 a ^(2) - 16 ab - 7b ^(2).

A

`5 a ^(2) - 36 ab - 15 b ^(2) `

B

`5a ^(2) + 36 a b - 15 b ^(2)`

C

`5a ^(2) - 36 ab + 15 b ^(2)`

D

None of the above

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((63+36)^(2)+(63-36)^(2))/(63^(2)+36^(2)) =?

Subtract : 5a ^(2) b ^(2) c ^(2) from -7a ^(2) b ^(2) c ^(2)

(63)^(2)-(12)^(2)=?

Find the product (7a-5b)(49a^(2)+35ab+25b^(2)) .

Find the products: (7a-5b)(49a^(2)+35ab+25b^(2))

Fractorise: 63a ^(2) - 112b^(2)

(csc ^ (2) 63 ^ (@) + tan ^ (2) 24 ^ (@)) / (cot ^ (2) 66 ^ (@) + sec ^ (2) 27 ^ (@)) + (sin ^ (2) 63 ^ (@) + cos63 ^ (@) sin27 ^ (@) + sin27 ^ (@)) / (2 (csc ^ (2) 65 ^ (@) - tan ^ (2) 25 ^ ( @)))