Revision Algebra Prep2 Second Term

If x – y = 5 , x + y = 6 , then x² – y² = …………………………..

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 If a ( x + y ) – b( x + y ) = 15 , x + y = 5 , then a – b = …………

If x + y = 3 , then x² + 2 x y + y² =……………

( 75)²-( 25 )² = 100 × ...........

If 3^x = 5 then ( 27)^x = ……………..

if( 4 )^2x-6 = 1 then x= ........

if ( 2 )^x-2 = 16 then x = ...........

In an experimental of throwing a die once,

the probability of getting number 7 = ………