Potrzebne ! Równanie prostej na płaszczyźnie . A(2,-1) B (-1,2) y=ax+b
y = ax + b klamra: −7 = −2a + b 2 = a + b −9 = −3a a = 3 2 = 3 + b b = −1
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y = ax + b klamra: −7 = −2a + b 2 = a + b −9 = −3a a = 3 2 = 3 + b b = −1