SOLUTION: When asked to solve the equation (x + 3)(2x - 1) = 5 a student proceeded as follows:
x+3=5 or 2x-1=5
x=2 or x=3
Describe, in your own words, what this student did wro
Algebra ->
Polynomials-and-rational-expressions
-> SOLUTION: When asked to solve the equation (x + 3)(2x - 1) = 5 a student proceeded as follows:
x+3=5 or 2x-1=5
x=2 or x=3
Describe, in your own words, what this student did wro
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Question 359540: When asked to solve the equation (x + 3)(2x - 1) = 5 a student proceeded as follows:
x+3=5 or 2x-1=5
x=2 or x=3
Describe, in your own words, what this student did wrong and what he/she should have
done.
You can put this solution on YOUR website! You cannot use the zero product rule unless the product is zero.
(x+3)(2x +1)=5
2x² +7x +3 = 5
2x² + 7x - 2 = 0
use quadratic formula
x = [-7 ± √(49 - 16)]/4 = (-7±√33)/4
