Pliss jawab no 6 dan 7

Pliss jawab no 6 dan 7

6.
$frac{2-3x}{6x+5} + frac{x+1}{2x-1} \ = frac{(2-3x)(2x-1)+(x+1)(6x+5)}{(6x+5)(2x-1)} \ = frac{(4x-2-6x^{2}+3x)+(6x^{2}+5x+6x+5)}{(6x+5)(2x-1)} \ = frac{(-6x^{2}+7x-2)+(6x^{2}+11x+5)}{(6x+5)(2x-1)} \ = frac{(-6x^{2}+6 x^{2})+(7x+11x)+(-2+5)}{(6x+5)(2x-1)} \ = frac{18x+3}{(6x+5)(2x-1)}$

answer = D

7.
p = panjang
l = lebar
L = luas

p = l + 8 >> p = x + 8
l = x

Luas kertas = panjang kertas × lebar kertas
= ((x + 8) + (0,5×2)) × (x + (0,5×2))
= (x + 9) × (x + 1)
$= x^{2} +x+9x+9 \ = x^{2} +10x+9$

jawaban = B