Question 8 Multiply: a) $$(x + 8)(x + 9)$$ b) $$(3c + 4)(5c - 2)$$
Added by Mar W.
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For part a): $$(x + 8)(x + 9)$$ First: $$x * x = x^2$$ Outer: $$x * 9 = 9x$$ Inner: $$8 * x = 8x$$ Last: $$8 * 9 = 72$$ Show more…
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