1) х(х+3)=10 2)х(х-1)=42 3)(х+7)х=18 4)(х-9)х=36

Question

1) х(х+3)=10 2)х(х-1)=42 3)(х+7)х=18 4)(х-9)х=36

Answer 1

1)x1=10 X+3=10 X2=10-3 X2=7 2) x1=42 X-1=42 X2=41+1 X2=42 3) x1=18 X+7=18 X2=18-7 X2=11 4) x1=36 X-9=36 X2=36+9 X2=45

Answer 2

1) х(х+3)=10...х квадрат+3х-10=0, х1=-5, х2=2

2) х(х-1)=42...хквадрат-х-42=0, х1=-6, х2=7

3) (х+7)х=18....х квадрат+7х-18=0, х1=-9, х2=2

4) (х-9)х=36....х квадрат-9х-36=0, х1=-1, х2=10