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2x+4=10 lub 2x+4=-10
2x=6 lub 2x=-14
x=3 lub x=-7
A(1,2) B (3,7)
y= ax + b
2= a+ b
7 = 3a +b
/ -2 = -a - b
+ / 7= 3a + b
5= 2a
a = 2/5
2 = a+b
2 = 2/5 + b
2/5 + b = 2
b= 2 - 2/5
a= 2/5
b= 1 3/5
zapomnialem na kartce dopisac ostatecznego wyniku
prosta ma rownanie
y=2/5a+8/5
10-4 = 2x
2x = 6
x=3
A(1,2) B (3,7)
y= ax + b
2= a+ b
7 = 3a +b
/ -2 = -a - b
+ / 7= 3a + b
5= 2a
a = 2/5
2 = a+b
2 = 2/5 + b
2/5 + b = 2
b= 2 - 2/5
a= 2/5
b= 8/5 = 1 3/5