exam Maths Puzzle Numerical Ability

factor the polynomial completely

121rSQUARED-64tSQUARED

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exam Other Question

3x-6y=9

4x-2y=24 Helo,I`m having problems with fractions and like terms, can you help me????
ex. 1/4[f-10]-3[2+f]= -7
If you can solve this I would be very thankful