Question

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Answer 1

4)a)2a-3bc+4a=2(-3)-3(2)(-4)+4(-3)=-6-6(-4)-12=-6+24-12=6

b)-3a pangkt2 b+2ac=-3(-3pangkat2)(2)+2(-3)(-4)=-3(9)(2)-6(-4)=-54+24=-30

Answer 2

1a) (8a + 4) - (2a - 5)
= 8a - 2a + 4 + 5
= 6a + 9
b) (3p² - 3p - 2) - (6p² + 4p + 6)
= 3p² - 6p² - 3p - 4p - 2 - 6
= -3p² - 7p - 8
c) 4(x + 3) - 2(3x + 4)
= 4x + 12 - 6x - 8
= -2x + 4
= 2(-x +2)
d) 3(2y - 5) - 4(2y + 2)
= 6y - 15 - 8y - 8
= -2y - 23
2a) 2(x - y) + (x - y)
= 2x + x + 2y - y
= 3x - y
b) 3(p - 2q) - 5(p + 3q)
= 3p - 5p - 2q - 3q
= - 2p - 5q
c) -5(x - 2y²) + 3(3x - 2y²)
= -5x + 10y² + 9x - 6y²
= 4x + 4y²
= 4(x + y²)
d) 6(a² - 2b) - 2(a² + 5b)
= 6a² - 12b - 2a² - 10b
= 4a² - 22b
= 2(2a² - 11b)
3a) 6x - 8y
= 2(3x - 4y)
b) 3x - 6y + 12z
= 3(x - 2y + 4z)
c) -6p² - 8pq + 16qr
= 2(-3p² - 4pq + 8qr)
d) -3p + 9q - 12r
= 3(-p + 3q - 4r)
4a) 2a - 3bc+ 4a
= 2.(-3) - 3.2(-4) + 4(-3)
= (-6) + 24 - 12
= 6
b) -3a²b + 2ac
= -3(-3)².2 + 2(-3)(-4)
= (-54) + 24
= (-30)
c) 4a - 2bc + 3c²
= 4(-3) - 2.2(-4) + 3(-4)²
= (-12) + 16 + 48
= 52
d) a² + 4bc - 2abc
= (-3)² + 4.2(-4) - 2(-3).2(-4)
= 9 - 32 - 48
= -71
5a) 6y² - 10y²
= - 4y²
b) 4x² - 2y + 1 - 5x² + x + y
= -x² - y + x + 1
c) 3ab - 4b² + 2ab - 5b²
= 5ab - 9b
= b(5a - 9)
d) 5x + 3y - 8x + 11y
= -3x + 14y
6) (2x - 3y) + (4x - 2y)
= 6x - 5y
b) (-8p + 3) + ( 6 - 2p)
= -10p + 9
c) (x - 3y) + (4x + 8y)
= 5x + 5y
= 5(x + y)
d) (2a² + 3b -5c) + (-6a² + 2c - 3b)
= -4a² - 3c