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Find the roots of y=x^{2}+2x+2

y=x 2 +2x-3 Can solve using quadratic equation. Using the square method to obtain for the square term and x term (x+1)(x+1) = x 2 +2x+1 Therefore (x+1)(x+1)-4=y To find roots equate to zero: (x+1)(x+1)-4=0 T...
HS
Answered by Harry S. • Maths tutor
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Simplify i^{4}?

Simplify i 4 ? We know that i = -1 1/2 Therefore i 2 =-1 As i 4 =i 2 xi 2 Then i 4 =-1x-1=1
HS
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Find the intercept between the two equations below?

y = 2x+5 y=x+1 First equate: 2x+5=x+1 Rearrage for x: 2x-x=1-5 Which gives: x=-4
HS
Answered by Harry S. • Maths tutor
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Describe how ventilation of the lungs occurs.

Ventilation is the process of moving air in and out of the lungs. This is brought about by pressure changes in the thoracic cavity. During inspiration, the diaphragm contracts causing it to flatten and move ...
ES
Answered by Emily S. • Biology tutor
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‘So I conclude that space and time are things of the body and have little to do with our selves. My Country is Truth.’ (Emily Dickinson to Joseph Lyman) Discuss space, or time, or truth, in the poetry of Emily Dickinson. (2000 words)

For Emily Dickinson, despite being a subjective “thing of the body”, time is essential to the construction of her poetic worlds. The association of time and temporality with mortal life and transience allows...
JT
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