Question

BENTUK SEDERHARNA DARI (× + 3)pankat2 -(x - 3)pankat2 =....... A.2xpankat2 + 18. b.9x + 18. c.12x d.18x.​

Answer 1

Jawaban:

Penyelesaian :

[tex] \sf (x + 3) {}^{2} - (x - 3) {}^{2} [/tex]

[tex] \sf = (x + 3)(x + 3) - (x - 3)(x - 3)[/tex]

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

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

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

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

[tex] \sf = {x}^{2} - {x}^{2} + 6x + 6x + 9 - 9[/tex]

[tex] \sf = {x}^{2} - {x}^{2} + 6x + 6x + 0[/tex]

[tex] \sf = 0 + 6x + 6x [/tex]

[tex] \sf = 0 + 12x[/tex]

[tex] \sf = \red{12x}[/tex]

Jawabannya adalah c.

'조슈아' (Svt)