factorise the following 1st 7x^2-7 2nd 8-50y^2z^2....
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7 x ^2 - 7
= 7 ( x ^ 2 - 1 )
= 7 ( x ^ 2 - 1 ^ 2 )
Using identity - ( a^2 - b ^ 2 ) = ( a + b ) ( a - b )
= 7 ( x + 1 ) ( x - 1 ) Ans.
= 7 ( x ^ 2 - 1 )
= 7 ( x ^ 2 - 1 ^ 2 )
Using identity - ( a^2 - b ^ 2 ) = ( a + b ) ( a - b )
= 7 ( x + 1 ) ( x - 1 ) Ans.
AnmolAdwani:
ans. the second one
2nd one question is not clear
wait
8-50y^2 z^2
now is it
y ^2 and z ^2 are in multiplication form..
??
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