Question

Jika (18y-15)kuadrat = ay(kuadrat) + by + c, maka nilai a+b+c adalah...

tolong pake cara yapp!

Answer 1

(18y - 15)² = ay² + by + c
(18y - 15) × (18y - 15) = ay² + by + c
324y² - 270y - 270y + 225 = ay² + by + c
324y² - 540y + 225 = ay² + by + c

Jadi, a = 324, b = -540, c =225

Answer 2

(18y - 15)² = ay² + by + c
(18y - 15) × (18y - 15) = ay² + by + c
324y² - 270y - 270y + 225 = ay² + by + c
324y² - 540y + 225 = ay² + by + c

324 itu sama aja a
-540 itu sama aja b
225 itu juga sama aja c 

a = 324, b = -540, c =225 :)