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Verified answer
1.x² + 2x - 35 = 0
(x + 7)(x - 5) = 0
x = -7 atau x = 5 ✓
2.
x² - 16x + 64 = 0
(x - 8)² = 0
x = 8 ✓
3.
5x² + 22x - 15 = 0
x1.x2 = c/a = -15/5 = -3 ✓
4.
f(x) = x² + 3x + 2
f(0) + f(1) + f(2)
= 2 + 6 + 12
= 20 ✓
5.
x² - 6x + 4 = 0
x1 + x2 = -b/a = -(-6)/1 = 6 ✓
6.
x² + 2x + 3 = 0
x1 + x2 = -b/a = -2/1 = -2 ✓
Berikut ini yang merupakan akar persamaan kuadrat X^2+2x-35=0 adalah
X^2+2x-35=0
(x + 5) (x - 2) = 0
x = -5 atau x = 2
No. 2
Akar akar persamaan kuadrat x^2-16x+64=0 adalah
x^2-16x+64=0
(x - 8) (x - 8) = 0
x = 8
No. 3
Hasil Kali dua akar persamaan kuadrat 5x^2+22x-15=0 adalah...
5x^2+22x-15=0
a = 5
b = 22
c = -15
x1 . x2 = c/a
x1 . x2 = -15/5 = -3
No. 4
jika f(x) =x^2+3x+2 maka f(0)+f(1)+f(2) adalah
f(0)+f(1)+f(2)
= 0^2+3(0)+2 + 1^2+3(1)+2 + 2^2+3(2)+2
= 2 + 1 + 3 + 2 + 4 + 6 + 2
= 20
No. 5
f(x)=X^2-6x+4
a = 1
b = -6
c = 4
x1 + x2 = -b/a
x1 + x2 = -(-6)/1 = 6
No. 6
Jumlah akar akar persamaan kuadrat x^2+2x+3=0 adalah
x^2+2x+3=0
a = 1
b = 2
c = 3
x1 + x2 = -b/a
x1 + x2 = -2/1 = -2