Question

1. 9y²+7y²-4xy+3xy+5y =.....
2. 5x - 3x - 3y - 5y + 7 - 4=.....
3. (2x-3)(x+5)=......
4. (2x + y ) ³=.....
5. Hasil bagi 4x²+16x+15 oleh (2x+5) = .....

Answer 1

1. 9y²+7y²-4xy+3xy+5y = (9+7)y² -(4-3)xy + 5y = 16y² -xy +5y = y(16y - x +5)

2. 5x - 3x - 3y - 5y + 7 - 4 = (5-3)x -(3+5)y +(7-4) = 2x - 8y + 3

3. (2x-3)(x+5) = 2x(x+5) -3(x+5) = 2x² +7x -15

4. (2x + y ) ³= 2x(4x² + 4xy + y²) + y(4x² + 4xy + y²) = 8x³ + 12x²y + 6xy² + y³

5. Hasil bagi 4x²+16x+15 oleh (2x+5)
= (2x+5)(2x+3)/(2x+5) = (2x+3)