Question

- 2 × ao quadrado + 4 × = -7

Answer 1

-2x²+4x=-7

-2x²+4x+7=0
a=-2
b=4
b=7

basckara  -b+-√delta÷2a

delta=b²-4.a.c

-4+-√72÷2×(-2)
-4+-√72÷-2
x'=-4+72÷-2 =68÷-2 =-34
x"=-4-72÷-2 =-76÷-2=+38