ページ1:

2 (3)-3A+2B-C
==
=
-3(x²+39² = 2x9) +2 (9² +3x³-2x²) - (-3x²+19-49³)
-3x²-99% + 6x9 +297 + 619-41² 13x²-194 4 Y '
--4x²-392 +1173
(4) 3 (2A+C)-2{2 (A+C)–(B−C)}
6A+3C-2(2A+2C-B+C)
=6A+3c-4A-6c+2B
=2A+2B-3C
=2 (1139-219)+2 (9² + 319-21²)-3(-3x²+19-192)
2x169417 +2 7 1 6 × 2-4 x² + 9 1² - 3×2 (129)
=7x²+2092x7
t
H
練2 (1) 3/-2B)-2(A-2B-C)
=3A-6B-2A+4 B+ 2 C
=A-2B+2C
3
= -2x² +14x² 9 + 59 ³ -2(x²9-319³ +29³) + 2(3x³ −2x²g)
=
2 13 4 4 1 ² 9 4 5 9³ 2x²9 + 6×3² 493 463 4x² y
- 4x² - 2 x ²² y + bx g 2 + y ³
H
(2) 3A-2{(2A-B)-(A−3B)} −3C
3A-22A-B-A +3B)-3c
=3A-2 (A +2B)-3C
-3A-2A-4B-3 C
=A-4B-3C
=-2x²+4x²Y+59³-4(1³Y-319² +29³)-3(31³ – 2ª²y)
3
3
= 2 x² 1 4 x J j ≤ 9 ³ €¶ x² 9 + 2 x y ² – 8 9 ³ ( TV + b x D
= -11x³ + 6x ² y - 3 y 3 +12192
x
B (1) (-19³) (-3x²g)
(xy) (-3x²9)
5
= B√gs H
1 1
(2)-a²b (-3a²bc²)³
= (a+b)(-27 a²b² c
6
=27a²b² c²
4
(3) 3abc (a+4b-2c)
=3a²bc+12ab²e babc" //

ページ2:

(4) (-x9 | (3x²-29-4)
=(x²9³) (3x²-27-4)
= 3x + y² = 2x²y ³ — 4x²y ²
4
|³] (1) (−ab)*(-2a³b)(2)(−21*9*2³)(-31³9³Z") (4) (-2x)*(3x²-2114)
=(a²b²) (-2 a³b)
=
=6x9427
g "
= (-81³)(31²-2x+4)
2a5b³
11
(3) 2a² bc (a-3b²+2c)
=2 a²bc6a²b°c + 2 a²bc" f
(1) (32+2)(4-3-1)
=121-91731481 -6x-2
12x²x²-94-2
5(1)(a+2)=a9a+4
H
=MX" + 16x²-36x³ 1
(2) (31³ - 5 1²+1) (1−x+2x²)
24
= 3x²-5x+13x²+51² x+6x³ 10x²+2x²
= 615-1351 +871³-3x²-2+1
"
H
32
(1) (113) (1-5)= 12-15 (5) (2x+3)(3x+4) = 61'41724124 (0) (41+9) (79-31) -181]–[21”
(2)(31-49)=91-2917-4169* (3)(za+b) (2 a−b) = ta² bu
サ
(1)(A+3)(1–5)
#1
+992-317
=-121125x177
[6](1+3)(12-3x+9)
= x² + 3 x*x 7 x + 3x² JA +27
FXD W