Question

a×10÷5=2
a×a+b×2=18
b×b=c

Answer 1

Răspuns:

a×10÷5=2

a x 2 = 2

a = 2 : 2

a = 1

a×a+b×2=18    dar a =1

1 x 1 + b x2 = 18

1 + b x2 = 18

b x 2 = 18 -1

b x 2 = 17

b = 17:2 = 17/2

b×b=c ,   dar b = 17/2

17/2 x 17/2 = c

289/4 = c

c = 289/4

Answer 2

a × 10 : 5 = 2

a × 10 = 2 × 5

a × 10 = 10

a = 10 : 10

a = 1

a × a + b × 2 = 18

1 × 1 + b × 2 = 18

1 + b × 2 = 18

b × 2 = 18 - 1

b × 2 = 17

b = 17 : 2

b = 8, 5

b × b = c

8, 5 × 8, 5 = c

c = 72, 25