Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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Transcribed Image Text:Solution
a 3- (6 – 5x) =3 – 6 + 5x
b 2x - (8- 10х) -D 2х - 8 +
= -3 + 5x
= 12x – 8
c 3(-2x+5)+4(3x + 6) = -6x + 15 + 12x + 24
=-6x+ 12x + 15 + 24
= 6x + 39
d -4(-2x+5) – 6(4 – 2x) = 8x – 20 – 24 + 12x
= 8x + 12x – 20 – 24
= 20x – 44
Exercise 11A
1 Simplify:
Example 1
а -За x 2
b -6b x (-5)
с -(-бт)
d 2x(-3а)
е -5а x (-3b)
f -(-5h)
g -7x(-3a)
h -mx3
i 2аx(-За)
j -4x x (-3x)
k -За X 5а
Example 2
2 Expand the brackets in each case.
а 3(х + 2)
b 5(2x + 3)
c 6(6x+ 3)
d -5(4x + 7)
е 7(5а -6)
f -4(5+2b)
g 7(3z+5)
h 6(2a – b)
і -11(6а — 5)
j -7(6 – x)
k -6(-3х — 4)
1-5(2а — 3b)
o -7(-7m – 3)
m -3(-6т + 5)
n -3(-m+ 8)
р-4(2-Зc)
(2x-9)
Example 3ab
3 Expand the brackets and collect like terms in each case.
a 3(2x – 5) + 5x
ь 6(х - 3) + 10
с 4(2х - 3) — 5
d 6(x– 7) + 6x
е -4(п -6) + 4n
f 7(2m – 5) + 8
42
ICE-EM MATHEMATICS YEAR 8 BOOK 2
ISBN: 978-1-107-64841-8
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O The University of Melbourne / AMSI 2011
g -4(8k +7) + 60k
h 7(-8m – 3) + 5m
Transcribed Image Text:Exercise 11A
1 Simplify:
а -За x 2
е -5а х (-3b)
i 2ax (-За)
2 Expand the brack
а 3(х + 2)
d -5(4x+ 7)
g 7(3z+5)
ј -7(6 — х)
m -3(-6т + 5)
р -4(2 — Зс)
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