Question

Sederhanakan :
1. (x + 2) ²
2. (x - 3) ²
3. x² - 9
4. (2x + 3) ²
5. (2x - 5) ²
6. 4a² - 9b²
7. Kurangkan 3 (x - 5) dari 4 (x + 3)

Answer 1

4x+12-3x+15=4x-3x+12+15=x+27

Answer 2

1) (x+2)²= (x+2) (x+2)= x²+2x+2x+4=x²+4x+4
2) (x-3)²= (x-3) (x-3)=x²-3x-3x+9=x²-6x+9
3)
4) (2x+3)²=(2x+3) (2x+3)= 4x²+6x+6x+9=4x²+12x+9
5) (2x-5)²=(2x-5) (2x-5) = 4x²-10x-10x+25=4x²-20x+25
6)
7) 4(x+3) - 3(x-5)= 4x+12-3x+15=4x-3x+12+15=x+27