SOLUTION: Alicia is thinking of a number. She subtracts the square of this number from six times the number and then subtracts eight from the result.
a) use x to write the expression that d
Algebra.Com
Question 716065: Alicia is thinking of a number. She subtracts the square of this number from six times the number and then subtracts eight from the result.
a) use x to write the expression that describes the information
b) factorise the expression in part a)
c) what could this help us to find out?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
She subtracts the square of this number from six times the number and then subtracts eight from the result.
a) use x to write the expression that describes the information
-x^2 + 6x - 8 = 0
b) factorise the expression in part a)
Easier to factor if you the coefficient of x^2 is one, mult by -1
x^2 - 6x + 8 = 0
(x-4)(x-2) = 0
two solutions
x = 4
x = 2
c) what could this help us to find out? Not sure what this means here.
RELATED QUESTIONS
Bruno is thinking of a mystery number. If he divides it by eleven and then subtracts 7... (answered by solver91311)
when a student subtracts 18 from a number, the result is 1/4 of the number. What is the... (answered by Adrianne15)
When a student subtracts 18 from a number, the result is 1/4 of the number. What is the... (answered by JulietG)
when a student subtracts 10 from a number, the results is 1/2 of the number. whats the... (answered by Cromlix)
Liam thinks of a number.
He multiplies the number by 5 and then subtracts 60 from the... (answered by nerdybill)
benny thinks of a number subtracts 18 from it ana divides the difference by 3. the result (answered by stanbon)
if sarah subtracts five times her number from 24,she gets 4. what is sarah number? write... (answered by EMStelley)
Evan thinks of two numbers. If he adds 2 to the first number and then multiplies the sum... (answered by josgarithmetic,MathTherapy,greenestamps)
Jonas takes a two-digit number and subtracts the sum of the digits from it. Which of the... (answered by Alan3354)