3 years ago

Use the quadratic formula to find both solutions to the quadratic equation

Mathematics

1 answer:

romanna [79]3 years ago

5 0

Answer:

3x-x+6=0

2x+6=0

2x=-6

x= -6/2

x=. -4

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A square with a side of y is transformed into a rectangle by adding 10 to one side and then subtracting 10 from another. Express

Kaylis [27]

Answer: $y^2-100.$

Step-by-step explanation:

if we have a square with sides 'y' units,

then, its breadth = length = y

If we add 10 to one side it will become (y+10) (longer one) and subtract 10 from another, then it will become (y-10) (shorter one).

Area of rectangle = breadth x length

So, area of rectangle $= (y+10)(y-10)$

$= y^2-10^2=y^2-100\ \ \ \ \ [(a-b)(a+b)=a^2-b^2]$

Hence, the new area as a polynomial = $y^2-100.$

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3 years ago

Simplify? please I am lost

jekas [21]

Answer:

Step-by-step explanation:

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4 years ago

Simplify x^2-9 over x^2-3x

Alla [95]

Answer:

$\frac{x+3}{x}$ or x+3/x

Step-by-step explanation:

Using D.O.T.S (difference of two squares) formula :

$a^{2} -b^{2} = (a+b)(a-b)$

$x^{2} -9= (x+3)(x-3)$

Factorise the second bit:

$x^{2} -3x = x(x-3)$

Now write out this fraction:

$\frac{(x+3)(x-3)}{x(x-3)}$

Now we can cancel out repeated terms (x-3):

$\frac{(x+3)}{x}$
This is our final answer:

$\frac{x+3}{x}$

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3 years ago

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Shtirlitz [24]

How about: 5 times 6 = 30

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4 years ago

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-3(2h + -5h2) + 2h<br> Simplify the expression

Grace [21]

Answer:

26h

Step-by-step explanation:

-3(2h-10h)+2h

-6h+30h+2h=26h

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3 years ago

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