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ket :
^ = pangkat
√=akar (panjang)
per : per (panjang kebawah)
2x^2 + 8x + 15 =0
x12=-b+-√b^2-4(a)(c)per 2(a)
x12=-8+-√8^2-4(2)(15)per2(2)
x12=-8+-√64-120per 4
x12=-8+-√-56per 4
x12=-8+-2√-14per 4
x1=-8+2√-14per 4
x2=-8-2√-14per 4
3x^2-11x-20=0
3X20=60
3x^2-15x+4x-20=0
3x(x-5) + 4(x-5)
(3x+4) (x-5)
x1=-4/3
x2=5
bingung ya ? susah cara nulisnya :3