Asked by david
how would you factorise
a) 9x^2 - 49
b) 9x^2 - 121
c) 49x^2 - 25x^2
thankyou
a) 9x^2 - 49
b) 9x^2 - 121
c) 49x^2 - 25x^2
thankyou
Answers
Answered by
Reiny
Look up "difference of squares"
Each of your questions is a basic example of that type.
Each of your questions is a basic example of that type.
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