(1) 7y³x3y^
= 3599 +
(2) 3x^yx6x³y²
=
18n7y8
(3) (-x²y³)³
- x²y² +
(4) (-xy°)"
=-x²g
(5) x²y³x(x³y)³
ny ²³ x²y³
= x¹y²+
(6) 5a³bx(-ab²)³
= 52²6x-4³66
= -5a³b7
(7) 9a³x(-2a^)³
9a²x-8a¹2.
=-729 17
+
(8) 7x³yᵒx(-3x²y)²
= 7x²y² + 9x+y²)
-63x Fys
(9) (x+4)(x²+3x-6)
= n³+3x²_bn +4₂0² +/211-24
=X347㎜+6㎜-24
(11) (2x+1)(4x²-5x-1)
(10) (x-1)(4x²+2x-3)
= 4x³ + 2x²-3x 4x²-2n + 3
4x2² - 2x²-50 +3.
²07²-2-²-52-1
8x²-652²-72²-1
(12) (3x-1)(3x²+x-8)
=9x²+x²–24× KR²-N 18
92³-25x18
(13) (3x-2)(2x²+3x-1)
= 6n²³² +9x²-3n-2n²-bx+2
= 6₂²³ · 17x²-9×+2+
(14) (3x+4)(3x²-3x+4)
- 921²³-9x²² + 12x + 12x²=12n + 1 t
=9x²+3×12+16
✓
(15) (2a-3b)(2a²+ab+3b²)
= 40³² + 2a²b+bab==bab-3ab²
44²-40²6+3ab²-963
