Question

Bantuin dong besok dikumpulin . buat jalannya juga

Answer 1

5. d
6. d
7. c
8. b
9.
10. 7
11. b

Answer 2

1) 3(5x - 2)
= 3.5x - 3.2
= 15x - 6 (B)

2) 5x - 3(x + 2)
= 5x - 3.x -3.2
= 5x - 3x - 6
= 2x - 6 (C)

3) 6(x+y) - 2(x - 2y)
= 6.x + 6.y - 2.x - 2.(-2y)
= 6x + 6y - 2x + 4y
= 6x - 2x + 6y + 4y
= 4x + 10y (tdk ada opsi)

4) konstanta = angka yg tdk ada variabelnya = 8 (D)

5) (-3x - 2y) + (5x - y)
= -3x + 5x - 2y - y
= 2x - 3y (B)

6) (6x + 2) - (5x - 3)
= 6x - 5x + 2 + 3
= x + 5 (C)

7) (5x + 7) - (2x - 3)
= 5x - 2x + 7 + 3
= 3x + 10 (A)

8) -2 × m × n × m
= -2m × mn
= -2m²n (C)

9) x²z - 5y
= (-5)².(-1) - 5(4)
= 25.(-1) - 20
= -25 - 20
= -45 (tdk ada opsi)

10) x² + xy - z
= (-3)² + (-3)(-2) - 8
= 9 + 6 - 8
= 7 (B)

11) (2a/3b)²
= 4a²/9b² (A)

12) (a + 3)(b + 1)
= a.b + 3.b + a.1 + 3.1
= ab + 3b + a + 3
= ab + a + 3b + 3 (B)

13) (x + 6)(x - 3)
= x.x + 6.x - 3.x - 3.6
= x² + 6x - 3x - 18
= x² + 3x - 18 (tdk ada opsi)

14) (p + 11)(p - 11)
= p.p + 11.p - 11.p - 11.11
= p² + 11p - 11p - 121
= p² - 121 (A)

15) (m - 2n)²
= m² - 2.2n.m - 2²n²
= m² - 4mn - 4n² (B)