<span>-x^2 + x-1=0 divide by (-) </span><span><span>
</span>
</span><span>x^2-x+1=0 </span><span><span>
</span>
</span><span>x=1/2(+-) root of (1/2)^2-1 </span><span><span>
</span>
</span><span>x=1/2(+-) root of (1/4)-1 </span><span><span>
</span> </span><span><span>
</span></span><span>x=1/2(+-) root of (1/4)-1 </span>
<span>
x=1/2(+-) root of (1/4)-((4*1)/4) </span>
<span>
x=1/2(+-) root of (-3/4)
</span>
<span>which has not answers, because we can not take a root of negatives numbers</span>
Answer:
A) 130
Step-by-step explanation:
(2x + 18) + y = 180 <--- Is True
(4x - 14) + y = 180 <--- Is True
(2x + 18) + y = y + (4x - 14)
(2x + 18) = (4x - 14)
2x + 18 = 4x - 14
-2x + 18 = -14
- 18 - 18
-2x = -32
x = 16
2(16) + 18 = 50
4(16) - 14 = 50
180 - 50 = 130
The foundational concept of algebra is to use the alphabetical letters to find the unknown number.
Algebra is the concept that uses the alphabetical letters such as x, y, z, etc. to calculate the unknow numbers. here the letters are also called as variables. The values that are known in the expression as termed as constants.
The general operations performed on the algebra is
- Addition = x + y
- Subtraction = x - y
- Multiplication = x * y
- Division = x / y
Here the alphabets x and y are called variables.
Order of operations:
The order of operation in algebra is given as follows
- Perform all the operations inside the brackets
- Perform the operations on roots and exponents
- Perform all the division and multiplication operations moving from left to right
- Perform all the addition and subtraction operations from left to right.
To know mire about Algebra here
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