No.115 Substitution After Simplifying
POINT
First simplify the algebraic expression. Then substitute the given values.
Example
When \(a=-1,\ b=-4\), find the value of \(2(2a-3b)-2(3a-2b)\).
When \(x=-2,\ y=5\), find the value of \(3x^2\times2y^2\div3xy^2\).
① \(10\)
② \(-4\)
② \(-4\)
Try it yourself.
PRACTICE 01
When \(a=2,b=-3\), find the value of \(3(a-2b)-2(2a-b)\).
10
PRACTICE 02
When \(x=-1,y=3\), find the value of \(4x^2y\div2xy\).
-2
PRACTICE 03
When \(a=-2,b=5\), find the value of \(2(3a+b)-(a-2b)\).
10
PRACTICE 04
When \(x=3,y=-2\), find the value of \(2xy^2\times3x\div6y\).
-18
PRACTICE 05
When \(a=4,b=-1\), find the value of \(5(a+b)-3(a-2b)\).
-3
PRACTICE 06
When \(x=-2,y=-3\), find the value of \(6x^2y^2\div3xy\).
12