3) 9х²+12х+4+16х²-4х+4х-1=25х²-10х+1
25х²+12х-25х²+10х=1+1-4
22х=-2
х=-2/22
х=-1/11
4) а) (234-233)(234+233)=1*467=467
б) (139+61)²=200²=40000
в) (159-59)²=100²=10000
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3) 9х²+12х+4+16х²-4х+4х-1=25х²-10х+1
25х²+12х-25х²+10х=1+1-4
22х=-2
х=-2/22
х=-1/11
4) а) (234-233)(234+233)=1*467=467
б) (139+61)²=200²=40000
в) (159-59)²=100²=10000