Question

find the square of 35 by (a+b)square=a square+20b+b square​

Answer 1

Answer:

${(30 + 5)}^{2} = {30}^{2} + {5}^{2} + 2 \times 30 \times 5 \\ = 900 + 25 + 300 \\ = 1225$

Answer 2

Answer:≈1225

Step-by-step explanation:

≈(30₊ 5)2 ≈  30^2 ₊ 5^2  ₊ 2 × 30×5

≈900₊25₊300

Ans ≈1225

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