Penjelasan dengan langkah-langkah:
1.x²+2x-3=0
(x+3)(x-1)=0
x=-3 x=1
Kebalikan akar :
x'=-⅓ x'=1 ✔️
3x²-2x-1=0
(3x+1)(x-1)=0
x=-⅓ x=1 ✔️ (E)
2.x1²+x2²=29
(x1+x2)²-2x1.x2=29
(-3)²-2(c/a)=29
-2(c/a)=20
c/a=-10 (A)
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Penjelasan dengan langkah-langkah:
1.x²+2x-3=0
(x+3)(x-1)=0
x=-3 x=1
Kebalikan akar :
x'=-⅓ x'=1 ✔️
3x²-2x-1=0
(3x+1)(x-1)=0
x=-⅓ x=1 ✔️ (E)
2.x1²+x2²=29
(x1+x2)²-2x1.x2=29
(-3)²-2(c/a)=29
-2(c/a)=20
c/a=-10 (A)