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b. 2².-3-0.5²+2.-7² =-12 -0+98 = 86
c. (5+7)² - 2².-3 = 144 + 12 = 156
=6 + 25 x -7
= 6 + - 175
=-169
b.(2kuadratx-3)-(0x5)+(2x-7)(2x-7)=13
=(4x-3)-0+4-14-14+49
=-12+4-28+49
=-40 + 53
=13
c.(5-(-7))(5-(-7)) - (2kuadrat x -3) = 156
=(5+7)(5+7) - (4 x -3)
=25 + 35 +35 +49 - (-12)
=144 + 12
=156