Oblicz wartość wyrażenia .
a) 3*(-1){ do kawatratu} - 2 *(-2){do kwatratu}
b) (-5){do kwatratu} + 2*(-5)*(-4)+(-4) { do kwatratu}
c) 3/4 * (2/3){do kwadratu} - 1/2 * (-4) { do sześcianu}
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a) 3 * 1 - 2 * 4 = 3 - 8 = - 5
b) 25 + 10 * (-4) + 16 = 25 - 40 + 16 = - 15 + 16= 1
c) 3/4 * 4/9 - 1/2 * (-64) = 1/3 + 32 = 32 1/3
a) 3*(-1)²-2*(-2)²=3*1-2*4=3-8=-5
b)(-5)²+2*(-5)*(-4)+(-4)²= 25+10*(-4)+16=25+(-40)+16= -15+16=1
c)¾*⅔²-½*(-4)³=¾*4/9-½*(-64)=12/36-(-32)=[po skróceniu ułamek 12/36=] ⅓+32=32⅓
-(- [oznacza plus]