Question

Tolong dijawab pakai cara yah nomor 10 & 11

Answer 1

10. 2x^2 - x - 6 + 5x^2 - 5x + 10
= 7x^2 - 6x + 4
Jawaban: B

11. 5(x + 3) - 25 = 3(4x - 1)
5x + 15 - 25 = 12x - 3
5x - 10 = 12x - 3
5x - 12x = -3 + 10
-7x = 7
x = -1
x - 1 = -1 - 1 = -2
Jawaban: A

Answer 2

10)
2x² - x - 6 + 5x² - 5x + 10
2x² + 5x² - x - 5x - 6 + 10
= 7x² - 6x + 4 ( B )

11)
5( x + 3 ) - 25 = 3( 4x - 1 )
5x + 15 - 25 = 12x - 3
5x - 10 = 12x - 3
5x - 12x = - 3 + 10
- 7x = 7
x = - 1

x - 1
( - 1 ) - 1
- 1 - 1 = - 2 ( A )