Vision
From school to the world: All students
prepared for productive futures
Bell Ringer – Entry Ticket
(14 Mar 17)
The square of a number minus twice the number is 63. Find the
number.
Vision
From school to the world: All students
prepared for productive futures
Bell Ringer – Entry Ticket
(14 Mar 17)
The square of a number minus twice the number is 63. Find the
number.
ANSWER:
x is the number:
x2 – 2x = 63
x2 – 2x – 63 = 0
Factors of 63:
1, 63 3, 21 7, 9
(x + 7)(x – 9) = 0
x+7=0
x–9=0
x=-7
x=9