That equals 28
31
7x2 plus 7x5 = 49
7x2- 63 = -35, when x equals 2
84
7x2 + 68xy - 20y2
(7x2 + 9)(4x - 1)
The solution: x = 6/7 and x = -1
7x2-10x+3=0 (7x-3)(x-1)=0
With difficulty because the discriminant of the quadratic equation is less than zero meaning it has no solutions
-20
22 + y