Question

If P=7 Q=5 then find (i)P²+Q²(ii) P²-Q²​

Answer 1

Step-by-step explanation:

${p}^{2} + {q}^{2} = {7}^{2} + {5}^{2} = 49 + 25 = 74 \\ {p}^{2} - {q}^{2} = (p + q)(p - q) \\ = (7 + 5)(7 - 5) \\ = 12 \times 2 \\ = 24$

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Answer 2

Answer:

P^2 +Q^2

= 7×7 + 5×5

= 49+ 25

= 74

P^2 - Q^2

= 7×7 - 5×5

= 49 - 25

= 24

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