Simplify an Expression
Date: 6/15/96 at 19:50:0 From: YWTSE Subject: Simplify an expression Simplify (9a + 2b) - (4a - 3b)
Date: 6/17/96 at 12:2:25 From: Doctor Dave Subject: Re: Simplify an expression Recall that a minus times a minus is a plus and a minus times a plus is a minus, so -(4a-3b) is the same as (-1)(4a-3b) and this is the same as (-1)(4a)+(-1)(-3b) which equals (-4a) + (3b) So, (9a + 2b) - (4a-3b) = 9a + 2b - 4a + 3b If you combine like terms you get 9a - 4a + 2b + 3b = (9-4)a + (2+3)b = 5a + 5b -Doctor Dave, The Math Forum Check out our web site!
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