One mark exercise problems III — task. Mathematics State Board, Class 7.

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Say whether the following statements are True or False.

1.

$(7x + 3)(7x - 4) = 49x^2 - 7x - 12$ .

2.

$(a - 1)^2 = a^2 - 1$ .

3.

$(x^2 + y^2)(y^2 + x^2) = (x^2 + y^2)^2$ .

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