1. Evaluate A =
12 22 32 42
2² 3² 4² 5²
3² 4² 5² 6²
4² 5² 6² 7²
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Answer:
5²+ [(-3+2²) + (4²-4)]?. First, carry out ... (12+3x)/10= 10+2x/6 ... Let's subtract 12+22+32+42+52 from both sides of the equation.
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