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shtirl [24]
2 years ago
5

X² + 2x - 3 = 0

Mathematics
1 answer:
tankabanditka [31]2 years ago
6 0

Step-by-step explanation:

x²+2x-3=0

(x²+3x)-(x-3)=0

x(x+3)-1(x+3)=0

(x-1)(x+3)=0

x=1 or x=-3

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X - y= -4 -2x +3y =6
STatiana [176]

Answer:

<em><u>x=-6, y=-2</u></em>, (As a point) (-6, -2).....The point form is not necessary unless you want to solve the system (of equations) by graphing.

Step-by-step explanation:

By substitution:

x-y=-4    By adding y on both sides,

x=y-4

Now you can substitute x for the expression (y-4)

Plug the (y-4) as x in the other equation.

So -2x+3y=6 becomes

-2(y-4)+3y=6

Now solve:

-2(y-4)+3y=6 distributes out to be

-2y+8+3y=6     Now combining like terms

y+8=6              Subtract 8 on both sides to isolate the variable

<u><em>y=-2</em></u>

Now plug the value -2 in where the y is in any equation (preferably the easier/less complicated one) and solve for x.

So x-y=-4 becomes

x-(-2)=-4

=x+2=-4

=<u><em>x=-6</em></u>

3 0
2 years ago
Which of the following are solutions to the equation below? Check all that apply. 3x2 + 27x + 54 = 0
Alex_Xolod [135]

Answer: the answers are -3 and -6

Step-by-step explanation:

6 0
3 years ago
Question 24 a bag with 6 marbles is shown below. a marble is chosen from the bag at random. what is the probability that it is w
maw [93]
The probablity of it being white is 1/6 from the information given

3 0
3 years ago
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ankoles [38]
4^3 becuase 9/3=3 is correct
3 0
2 years ago
Help, please? Thank you so much. Math problems
Lina20 [59]

Answer:no cheating

Step-by-step explanation:

8 0
3 years ago
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