Question

Expand:
(i) (2t + 5)(2t − 5);
(ii) (xy + 8)(xy − 8);
(iii) (2x + 3y)(2x − 3y).

Answer 1

Answer:

Step-by-step explanation:

1} (2t)^2-5^2

=4t^2-25

2}(xy)^2-8^2

=x^2y^2-64

3}(2x)^2-(3y)^2

=2x^2-9y^2

Answer 2

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