Question

Factorise 25x2+70xy+49y2

Answer 1

Answer:

Step-by-step explanation:

The exponent tells us to move the decimal point three places to the right. Finally, we fill in the missing positions with zeros. Therefore, 5.72 × 10³ written in standard notation is 5,720

Answer 2

25x^2=(5x)^2

70xy=2×5x×7y

49y^2=(7y)^2

So 25x^2+70xy+49y^2=(5x+7y)^2

(5x+7y)(5x+7y)

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