a)
1¹/₇ a² - 3a - 6 + 3a - 16a - 2= dla a= -0,5
1¹/₇a²-16a-8=
1¹/₇*(-0,5)²-16*(-0,5)-8=
1¹/₇*0,25+8-8=
²/₇
b)
7x - 2y + 2x - 4y +2 = dla x = -1,5 i y = 2 1/5
9x-6y+2=
9*(-1,5)-6*2⅕+2=
-13,5-13,2+2=
-24,7
c)
13ab - 4b + 3a +b + 7a - 12ab = dla a = -1,6 i b= 3 1/3
ab+10a-3b=
-1,6*3⅓+10*(-1,6)-3*3⅓=
-5⅓-16-10=
-31⅓
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a)
1¹/₇ a² - 3a - 6 + 3a - 16a - 2= dla a= -0,5
1¹/₇a²-16a-8=
1¹/₇*(-0,5)²-16*(-0,5)-8=
1¹/₇*0,25+8-8=
²/₇
b)
7x - 2y + 2x - 4y +2 = dla x = -1,5 i y = 2 1/5
9x-6y+2=
9*(-1,5)-6*2⅕+2=
-13,5-13,2+2=
-24,7
c)
13ab - 4b + 3a +b + 7a - 12ab = dla a = -1,6 i b= 3 1/3
ab+10a-3b=
-1,6*3⅓+10*(-1,6)-3*3⅓=
-5⅓-16-10=
-31⅓