|
|
|
|
|
|||||||||||
|
|
|||||||||||||||
UNIT
1 : ALGEBRA PREP
LESSON 10:
CHAPTER TEST SOLUTIONS
Solutions:
1.
Simplify.
a) (2x2 –3x-7) – (5x2 –
6x –9) b) 4x(2x – 3) – 2x(3x + 5) + x(3x – 1) c)
3(2a – 3b)2 – (3a + b)(2a – 3b)
Solutions:
a) (2x2 –3x-7) – (5x2 –
6x –9) b) 4x(2x – 3) – 2x(3x + 5) + x(3x – 1) c)
3(2a – 3b)2 – (3a + b)(2a – 3b)
=2x2 – 3x –7 –5x2
+6x + 9 = 8x2 – 12x –6x2
–10x +3x2 – x = 3(4a2 – 12ab + 9b2)
– (6a2 – 7ab – 3b2)
=
-3x2 +3x + 2 = 5x2 –23x = 12a2 – 36ab + 9b2
– 6a2 + 7ab + 3b2
= 6a2 –29ab +12b2
2.
Simplify. State any restrictions.
Solutions:
Solutions:
3. Solve and graph.
Solutions:
Solutions:
