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angga x1=(x1-2) x2=(x2-2)
x1 + x2 =5
x1 . x2 =7
pk barunya= x^2 - ( ( x1- 2) + ( x2- 2)) + ( x1-2) (x2-2)
x1+x2=(x1-2) + (x2-2) =x1+x2 -4 =5-4 =1
x1.x2=(x1-2)(x2-2) =x1 . x2 -2(x1+x2) -4 = 7- 10 - 4 =-7
pk barunya =x^2 -x -7
soal nomor dua x1=x2
x1+x1=m
x1^2 =3-m 2x1=m
x1^2=3-2x1 x1^2+2x1-3=0 = (x1-1) (x1+3)
x1=1 / x=-3
niali m = 2. x1 nilai m pertama=1.2 =2
kedua =-3.2=-6
jadi jawabannya 2 atau -6 sekian