SOLUTION: hi! i'm doing mymaths homework and it says,
write an expression for this rectangle side one x+2 side two x.
I have wrote the expression x squared+2x.
Now it says set up a quad
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Quadratic Equations and Parabolas
-> SOLUTION: hi! i'm doing mymaths homework and it says,
write an expression for this rectangle side one x+2 side two x.
I have wrote the expression x squared+2x.
Now it says set up a quad
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Question 736089: hi! i'm doing mymaths homework and it says,
write an expression for this rectangle side one x+2 side two x.
I have wrote the expression x squared+2x.
Now it says set up a quadratic equation to describe the situation, then solve it.
Please Help+Thanks!
Erin Answer by solver91311(24713) (Show Source):
Multiplying the expressions for the measures of the sides of a rectangle gives you the area of the rectangle. is indeed the correct expression for the product you describe and had you provided a number that represents the area of the rectangle, it would be a simple matter to set your product of sides expression equal to the given area from which it is a fairly simple manipulation to construct a quadratic equation in standard form. But lacking such a number representing the area, I can only show you in general what to do. Let represent the numerical value of the area of your rectangle. Then:
which can be converted to
Substitute your area value when you find it and solve the quadratic. By the way, such a quadratic will have two distinct roots and one of them will be negative. Since a negative number is an absurd value for a measure of the length of a side of a rectangle, discard that root. The positive root will be the width of your rectangle and the value will be the length.
John
Egw to Beta kai to Sigma
My calculator said it, I believe it, that settles it
