Wiedząc, że P= 3a+4, R= 7-2a, S= -a²+2a-3, wykonaj działania:
a) 2S+P×R
b) P×S+5R
c) R×S-2P²
a)2(-a²+2a-3)+3a+4*7-2a=-2a²+4a-6+3a+28-2a=-2a²+5a+22
b)3a+4*(-a²)+2a-3+5(7-2a)=3a-4a²+2a-3+35-10a=-5a-4a²+32
c)7-2a-a²+2a+3-2(3a+4)²=7-2a-a²+2a+3+(-6a-8)²=7-2a-a²+2a+3-36-64=-57-36a-a²
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a)2(-a²+2a-3)+3a+4*7-2a=-2a²+4a-6+3a+28-2a=-2a²+5a+22
b)3a+4*(-a²)+2a-3+5(7-2a)=3a-4a²+2a-3+35-10a=-5a-4a²+32
c)7-2a-a²+2a+3-2(3a+4)²=7-2a-a²+2a+3+(-6a-8)²=7-2a-a²+2a+3-36-64=-57-36a-a²