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3 years ago

Can x^2+4x-9=0 be simplified?

Mathematics

1 answer:

Aleksandr-060686 [28]3 years ago

3 0

Simplified? No solved for x? Yes

Solved with the quadratic equation yes is the answer in the picture

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-10+2= (operation of integers)<br><br>

ValentinkaMS [17]

Answer:

-8

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

For what value of x is r(x)= -21??

Naily [24]

Answer:

Rx= - 21

Rx/r= - 21/r

X=-21/r

4 0

1 year ago

Does dose anyone know how to solve this?

solniwko [45]

Answer:

Width of rectangle = 6 m

Length of rectangle = 11 m

Step-by-step explanation:

Let width of rectangle = w

Length of rectangle = 3w-7

Area of rectangle = 66 m²

We need to find length and width of rectangle

The formula used is: $Area=Length \times Width$

Putting values and finding w

$Area=Length \times Width\\66=(3w-7)(w)\\66=3w^2-7w\\3w^2-7w-66=0\\$

Solve using quadratic formula: $w=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

We have a=3, b=-7, c=-66

Putting values and finding w

$w=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\w=\frac{-(-7)\pm\sqrt{(7)^2-4(3)(-66)}}{2(3)}\\w=\frac{7\pm\sqrt{49+792}}{6}\\w=\frac{7\pm\sqrt{841}}{6}\\w=\frac{7\pm29}{6}\\w=\frac{7+29}{6}\:,\:w=\frac{7-29}{6}\\w=6, w=-3.6$

We get values of w as w=6 and w=-3.6

As we know width cannot be negative, so considering w = 6

So, Width = 6

Length = 3w-7 = 3(6)-7 = 18-7 = 11

So, Width of rectangle = 6 m

Length of rectangle = 11 m

6 0

3 years ago

What is 4/5 +3/2+5/3

Lelu [443]

3.96666666667 so technically it .96

7 0

2 years ago

Please tell me the answer plsss i will be sure to mrk u brainliest for the best answer

Finger [1]

Step-by-step explanation:

2^3 X 3^-4 X 5^2 / (2x5)^2 X 2 X 3^2 X 3^-6

I will simply the expression on the RHS if the bracket first

2^2 X 5^2 X 2 X 3^2 X 3^-6

= 2^3 X 3^-4 X 5^2

So, putting them together

Both sides have th same expression

They cancel out each other

Answer : 1

5 0

3 years ago