pembuat nol, x = 4
f(x) = x² - 11x + c
f(4) = 0
4² - 11(4) + c = 0
16 - 44 + c = 0
-28 + c = 0
c = 28
Jawabannya C
_______________________________
f(x) = 5x² + bx - 6
f(2) = 0
5(2)² + b(2) - 6 = 0
20 + 2b - 6 = 0
2b + 14 = 0
2b = -14
b = -7
f(x) = 5x² - 7x - 6
5x² - 7x - 6 = 0
(5x + 3)(x - 2) = 0
5x + 3 = 0
5x = -3
x = -3/5
Jawabannya B
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pembuat nol, x = 4
f(x) = x² - 11x + c
f(4) = 0
4² - 11(4) + c = 0
16 - 44 + c = 0
-28 + c = 0
c = 28
Jawabannya C
_______________________________
f(x) = 5x² + bx - 6
f(2) = 0
5(2)² + b(2) - 6 = 0
20 + 2b - 6 = 0
2b + 14 = 0
2b = -14
b = -7
f(x) = 5x² - 7x - 6
5x² - 7x - 6 = 0
(5x + 3)(x - 2) = 0
5x + 3 = 0
5x = -3
x = -3/5
Jawabannya B