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24 = C
25 = D
rincinya liat gambarnya :)
24.)a/a²-16 × a-4/5a = 1/5(a+4) [b.]
Cara :
⇨1/(a-4)(a+4) × a-4/5
⇨1/a+4 × 1/5
★ 1/5(a+4) [b.]
25.)10y/y²-3y-18 ÷ 5y/4y-24 = 8/y+3 [d.]
Cara :
⇨ 10y/y²-3y-18 × 4y-24/5y
⇨ 2/y(y+3)-6(y+3) × 4(y-6)
⇨ 2/(y-6)(y+3) × 4(y-6)
⇨ 2/y+3 × 4
★ 8/y+3 [d.]
Semoga membantu :D