Hasil kali akar akar persamaan 2x²+31x-20=0 adalah
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2.a
−b
+
b
2
−4.a.c
a: 2 b:3 c: (-20)
\frac{ \: - 3 \frac{ + }{} \sqrt{} {3}^{2} - 4.2.( - 20) \: }{2.2}
2.2
−3
+
3
2
−4.2.(−20)
\frac{ \: - 3 \frac{ + }{} \sqrt{9} - ( - 160) \: }{2.2}
2.2
−3
+
9
−(−160)
\frac{ \: - 3 \frac{ + }{} \sqrt{169} \: }{4}
4
−3
+
169
\frac{ \: {x}^{1} = - 3 - 13 \: }{4} = \frac{ - 16}{4} = - 4
4
x
1
=−3−13
=
4
−16
=−4
\frac{ \:x {}^{2} = - 3 + 13 \: }{4} = \frac{10}{4} = 2.5
4
x
2
=−3+13
=
4
10
=2.5
x¹= -4
x²= 2,5
[answer.2.content]
