Question

Expand the following
a) (3x - 7)² b) (4g + 5g)² c) (3k + 5j)² d) (a + 3b) (a - 3b)

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

a) 3x²‐2.3x.7+7²

9x²‐42x+49

b)4g²+2.4g.5g+5g²

16g²+40g+25g²

c)3k²+2.3k.5+5²

9k²+30k+25

d)a²‐3b²

a²-9b²