Question

1350-x x 15/200

$1350 - x \times 15upon200$
​

Answer 1

Step-by-step explanation:

Since

15

x

2

−

16

x

y

−

15

y

2

=

0

would not normally be considered a quadratic equation, it is not obvious that this question is what what was really intended.

A quadratic equation is normally of the form:

XXX

a

x

2

+

b

x

+

c

=

0

We could treat the given equation as if it were in this form with

XXX

a

=

15

XXX

b

=

−

16

y

XXX

c

=

−

15

y

2

The Quadratic Formula tells us

XXX

x

=

−

b

±

√

b

2

−

4

a

c

2

a

This would give us

XXX

x

=

16

y

±

√

256

y

2

+

900

y

2

30

XXXX

=

16

y

±

2

y

√

289

30

XXXX

=

8

±

√

289

15

y

XXXX

=

8

±

17

15

y

XXXX

=

25

15

y

=

5

3

y

XX

or

XX

−

9

15

y

=

−

3

5

y