Question

3(5x-1/6)pangkat2= ax^2+ bx +c, maka nilai a + b+ 12c=... a. 63 b. 71 c. 72 d. 84

Answer 1

3(5x - 1/6)(5x - 1/6)
3(25x^2 - 5x/6 - 5x/6 + 1/36)
75x^2 - 5x/2 - 5x/2 + 1/12
a = 75 b = -5 c = 1/12
a+b+12c = 75 + (-5) + (12 × 1/12 = 1)
= 71