Question

bantuin pr aku,soal aljabar mtk​

Answer 1

Jawaban:

a.

[tex] {x}^{2} + 9x - 8 {x}^{2} - x \\ = ({x}^{2} - 8 {x}^{2} ) + (9x - x) \\ = - 7 {x}^{2} +8x[/tex]

b.

[tex] - 3 {x}^{2} - 7x + 3 {x}^{2} + 2x \\ = ( - 3 {x}^{2} + 3 {x}^{2} ) + ( - 7x + 2x) \\ = - 5x[/tex]

c.

[tex]2 {x}^{2} - 6x - 2 - 3x \\ = 2 {x}^{2} + ( - 6x - 3x) - 2 \\ = 2 {x}^{2} - 9x - 2[/tex]

d.

[tex] {x}^{2} - 8x + 4 - 3 {x}^{2} + 8x \\ = ( {x}^{2} - 3 {x}^{2} ) + ( - 8x + 8x) + 4 \\ = - 2 {x}^{2} + 4[/tex]