Fill
`(1) (a+b)(a-b)=...... `
`(2) (a-b)^2=.....`

Fill in the blanks. (1) -2a^3b is a........ (2) (a^2-2b^2) is a ....... (3) (a+2b-3c) is a .......... (4) In -5ab , the coefficient of a is ...... (5) In x^2+2x-5 ,the........term is -5

If (a+b):(a-b)=1:5 then (a^2-b^2):(a^2+b^2)=

Fill in the blanks (a + b)^2 + (a - b)^2 = _

(1)/(2) (a + b) (a ^(2) + b ^(2) ) +(1)/(2) (a - b) (a ^(2) - b ^(2)) is equal to

If sin^(-1)((2a)/(1+a^2))+sin^(-1)((2b)/(1+b^2))=2tan^(-1)x , then x is equal to [a , b , in (0,1)] (a)(a-b)/(1+a b) (b) b/(1+a b) (c) b/(1+a b) (d) (a+b)/(1-a b)

Value of |(1,a,a^2),(1,b,b^2),(1,c,c^2)| is (A) (a-b)(b-c)(c-a) (B) (a^2-b^2)(b^2-c^2)(c^2-a^2) (C) (a-b+c)(b-c+a)(c+a-b) (D) none of these

If (x+1)/(x-1)=(a)/(b) and (1-y)/(1+y)=(b)/(a), then the value of (x-y)/(1+xy) is (2ab)/(a^(2)-b^(2)) (b) (a^(2)-b^(2))/(2ab) (c) (a^(2)+b^(2))/(2ab) (d) (a^(2)-b^(2)backslash)/(ab)