Verified answer

2k1 - 5k2 = -12

-4k1 + k2 = 6

4k1 - 10k2 = -24

-9k2 = -18

k2 = -18/-9 = 2

2k1 - 10 = -12

2k1 = -2

k1 = -1

pronto

vamos la

k1= a e k2= b okkk (troquei para nao confundir okkj)

w= au+bv

(-12,6)= a(2,-4)+b(-5,1)

(-12,6)= (2a, -4a)+(-5b,+b)

(-12,6)= (2a-5b, -4a+b)

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2a-5b= -12

-4a+b= 6 => b= (6+4a) substituindo na de cima

2a-5(6+4a)= -12

2a-30-20a= -12

-18a= -12+30

-18a= 18

a= 18/-18

a=k1=-1 okkk

b=(6+4(-1))

b= 6-4= 2

b= k2= 2 okkkkk