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Math 9 Chapter 4
Algebraic Expressions and Algebraic Formulas-2
1.
The lowest form of lx+mx-ly-my/3x
2
-3y
2
is?
a) l-m/3(x+y)
b) l+m/3(x-y)
c) None
d) l+m/3(x+y)
2.
The lowest form of the polynomial x+2/2x-3y × 4x
2
-9y
2
/xy+2y is?
a) 2x+3y/x
b) 2x+3y
c) 2x+3y/y
d) 2x-3y/y
3.
(a+b
2
+(a-b)
2
=?
a) a
2
+b
2
+2ab
b) 2(a
2
-b
2
)
c) a
2
+b
2
-2ab
d) 2(a
2
+b
2
)
4.
(a+b)
2
-(a-b
2
=?
a) 6ab
b) 4ab
c) -4ab
d) 8ab
5.
If a+b=7 and a-b=3 then ab =?
a) 10
b) -10
c) 21
d) 4
6.
(a+b+c)
2
=?
a) a
2
+b
2
+c
2
-2ab+2bc+2ca
b) a
2
+b
2
+c
2
+2ab-2bc+2ca
c) a
2
+b
2
+c
2
+2ab+2bc-2ca
d) a
2
+b
2
+c
2
+2ab+2bc+2ca
7.
If a
2
+b
2
+c
2
=43 and ab+bc+ca=3 then a+b+c will be?
a) 8
b) 12
c) 14
d) 7
8.
(a+b)
3
= ?
a) a
3
+3ab(a+b)-b
3
b) a
3
+3ab(a+b)+b
3
c) a
3
-3ab(a+b)+b
3
d) a
3
+3ab(a-b)+b
3
9.
(a-b)
3
= ?
a) a
3
-3ab(a-b)+b
3
b) a
3
+3ab(a+b)+b
3
c) a
3
-3ab(a+b)+b
3
d) a
3
-3ab(a-b)-b
3
10.
If x=-4 and y=9 then the solution of 3x
2
square root [y] +6/ 5(x+y)?
a) -6
b) 6
c) 10
d) 8
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