а)1)x^2-(x^2-16)=2x ;2) x^2-x^2+16=2x ; 3)16=2x; 4)x=16÷2=8 Отв:8. б)1)9y^2+6y+1-9(y^2-1)=8y-16; 2)6y+10=8y-16; 3)-2y+26=0; 4)y-13=0; y=13 ; Отв:13
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а)1)x^2-(x^2-16)=2x ;2) x^2-x^2+16=2x ; 3)16=2x; 4)x=16÷2=8 Отв:8. б)1)9y^2+6y+1-9(y^2-1)=8y-16; 2)6y+10=8y-16; 3)-2y+26=0; 4)y-13=0; y=13 ; Отв:13