Question

$25x {}^{2} + 9y {}^{2} + 30xy$
where X=8
y=10​

Answer 1

Answer:

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Answer 2

Answer:

$25 {x}^{2} + 9 {y}^{2} + 30xy \\ x = 8 \\ y = 10 \\ = 25 \times {8}^{2} + 9 \times {10}^{2} + 30 \times 8 \times 10 \\ \\ = 25 \times 64 + 9 \times 100 + 30 \times 80 \\ \\ = 1600 + 900 + 2400 \\ = 4900$

Step-by-step explanation:

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