. Solve the following quadratic equations by completing the squares.
1. x²+2x=1
2. x²-5x=3
3. m²-8m=-7
4. x²+8x=-15
5. 2x²+5x-3
1. x²+2x=1
2. x²-5x=3
3. m²-8m=-7
4. x²+8x=-15
5. 2x²+5x-3
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Answer:
1) x=-1
2) x= 5+√37 ; x= 5-√37
2 2
3) m=7 ; m=1
4) x= -3 ; x=-5
5) x=1/2 ;x=-3