Question

Soal nomor 1, 2, 3, dan 4 ~~~~~~

Answer 1

1a) (6x+5)+(-3x-6)
=6x+5-3x-6
=3x-1
b) (6x-5y-2z)+(-8x+6y+9z)
=6x-8x-5y+6y-2z+9z
=-2x+y+7z
c)3(2x²-4x+5)+2(4x²+3x-7)
=6x²-12x+15+8x²+6x-14
=14²-6x+1
2a) (7x+15y)-(5x-9y)
=7x-5x+15y+9y
=2x+24y
b)(5y-3x-4)-(5x-3y+7)
=5y+3y-3x-5x-4-7
=8y-8x-11
c)( 5x²-9xy-4y²)-(-x²+6xy+3y²)
=5x²+x²-9xy-6xy-4y²-3y²
=6x²-15xy-7y²
3a) 5x²(6x-3y)
= 30x³-15x²y
b)(2x-2)(x+5)
= 2x² -2x+10x-10
= 2x² + 8x -10
c) (x-5)(x²-4x+20)
= x³ -4x²+20x-5x²+20x-100
=x³-9x²+40x-100