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3 years ago

Someone please help me

Mathematics

1 answer:

makvit [3.9K]3 years ago

4 0

So first you need to add 4 to each side to get (x+5)^2=16. Next you need to take the square root of each side to get √(x+5)^2=+-√16. After that simplify to get x+5=+-4. Now subtract 5from both sides to look like x=-5+-4. Now just do x=-5+4 and x=-5-4 then solve to get x=-1 and x=-9.

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20% of____ is 15 ????

mixer [17]

Answer:

The Correct Answer is 3

Step-by-step explanation:

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2 years ago

How do i find the slope of 5x-12y=24??

Aloiza [94]

Rearrange into the form y = mx + c

m will be the gradient

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-12y = 24 - 5x

y = (24/-12) - (5/-12)x

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Please feel free to ask if you have any questions

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2 years ago

What are the solution(s) to the quadratic equation 9x2 = 4?

marta [7]

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3 years ago

Read 2 more answers

1.What is the shape of the graph of any quadratic function?

likoan [24]

Answer:

Inverted parabola

Two complex solution

Step-by-step explanation:

any quadratic equation can be expressed in terms of ax^2 + bx + c = 0

It has two solutions which can be found using formula $X =( -b + \sqrt{b^2 -4ac} )/2a \\or \ ( -b - \sqrt{b^2 -4ac} )/2a$

We know that for any value inside the square root function

if it is positive its solution will be real number

for example $\sqrt{9}$ we can have two real solution -3 and 3

if it is negative its solution will be complex number

for example $\sqrt{-9}$ we can have two complex solution

expressed in term of a + ib or a - ib

------------------------------------------------------------------------------------------

Given in the problem

we have ax^2 - bx + c

so its solution will be

$X =( -(-b) + \sqrt{b^2 -4ac} )/2a \\or \ ( -(-b) - \sqrt{b^2 -4ac} )/2a\\\\X =( b + \sqrt{b^2 -4ac} )/2a \\or \ ( b - \sqrt{b^2 -4ac} )/2a\\$

Since in this expression it is given in problem statement that b^2 - 4ac < 0 which will be a negative number and for negative number, its square root is complex number.

also X has two values as given above it will have two solution

hence it will have two complex solution based on above discussion.

Also for any quadratic equation shape of its curve if plotted on coordinate plane is parabolic.

If it has complex solution then curve of such expression will not pass through X axis

7 0

3 years ago

What is 3x +2 (5x -7) simplified

Anvisha [2.4K]

Answer:

16x - 14

Step-by-step explanation:

3x + 10x + -14 + 3x

16x - 14

7 0

3 years ago