An algebra problem by Lloyd Regalado

Algebra Level 1

The sum of these 2 numbers is 12. Their product is 32. What is the larger number?


The answer is 8.

This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try refreshing the page, (b) enabling javascript if it is disabled on your browser and, finally, (c) loading the non-javascript version of this page . We're sorry about the hassle.

1 solution

Let the two numbers be x x and y y .
According to Question.
x + y = 12 \Rightarrow x+y=12 ..... ( 1 ) (1)
x × y = 32 \Rightarrow x×y=32 ..... ( 2 ) (2)
From ( 1 ) (1) .
y = 12 x y=12-x
Putting y y in ( 2 ) (2) .
x × ( 12 x ) = 32 \Rightarrow x×(12-x)=32
= 12 x x 2 = 32 =12x-x^2=32
= x 2 12 x + 32 = 0 =x^2-12x+32=0
x = 4 , 8 x=4,8
Putting in ( 1 ) (1) .
This gives x = 4 x=4 and y = 8 y=8
Now, larger number is 8 . \boxed{8}.


Exactly :)

Lloyd Regalado - 5 years, 5 months ago

0 pending reports

×

Problem Loading...

Note Loading...

Set Loading...