Answer:
x = - 2 ± ![\sqrt{11}](https://tex.z-dn.net/?f=%5Csqrt%7B11%7D)
Step-by-step explanation:
To solve the equation using the method of completing the square.
Given
x² + 4x - 7 = 0 ( add 7 to both sides )
x² + 4x = 7
add ( half the coefficient of the x- term )² to both sides
x² + 2(2) x + 4 = 7 + 4
(x + 2)² = 11 ( take the square root of both sides )
x + 2 = ±
( subtract 2 from both sides )
x = - 2 ±
← exact solution
Answer:
10 x² - 4x
Step-by-step explanation:
Area trapezoid = 1/2 ( (b1+b1)h)
1/2( 2x * 10x - 4)
1/2(20x² - 8x)
10x² - 4x
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Right triangle
Use Sohcahtoa
Given hypothenuse = 10
Adjacent = x
And angle degree of 52
You can use Cosine
Cos(52) = x/10
0.6156614753 = x/10
x = 6.156614753
Round to nearest tenth
Solution: 6.2
Answer:
.55555555 infinitely or .556
Step-by-step explanation: