Выделите полный квадрат в трёхчлене:
1)2p^{2} -8p+7;
2)b^{2} +2b+5;
3)2q^{2} +8q+7;
2(p^2-4p+3,5)=2(p^2-4p+4-1/2)=2(p-2)^2-1
b^2+2b+5=(b+1)^2+4
2q^2+8q+7=2(q+2)^2-1
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2(p^2-4p+3,5)=2(p^2-4p+4-1/2)=2(p-2)^2-1
b^2+2b+5=(b+1)^2+4
2q^2+8q+7=2(q+2)^2-1