Question

Jika[18y-15]²=ay²+by+c, niali a+b+c=

Answer 1

324 y²-18y.15-18y.15+225
=324 y²-270 y-270 y+225
=324 y²-540 y+225
a=324
b=-540
c=225
a+b+c=324-540+225=-216+225=9

Answer 2

(18y - 15)²
= (18y - 15) (18y - 15)
= 324y² - 270y -270y + 225
= 324y² - 540y + 225

Jika 324y² - 540y + 225 = ay² + by + c
Maka, a = 324
           b = -540
           c = 225
Jawabannya a + b + c = 324 + (-540) + 225 = 9