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Solve the quadratic equation x^2 + x - 20 = 0

Factorising the left hand side we get x 2 + x - 6 = (x + 5)(x - 4). Therefore x 2 + x - 6 = 0 is the same as (x + 5)(x - 4) = 0. If multiplying two quantities equals 0, this means that one of the two must eq...
LJ
Answered by Lizlie J. • Maths tutor
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Why would you use a subjunctive in this sentence? "Quiero que venga conmigo."

The subjunctive refers to a mood that deals with any form of uncertainty, as opposed to the indicative which deals with certainty and factual actions. "Quiero que venga conmigo" expresses a desire ...
BS
Answered by Benjamin S. • Spanish tutor
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Describe the difference between respiration and breathing.

Respiration - the biochemical process in which the cells of an organism obtain energy by combining oxygen and glucose, resulting in the release of carbon dioxide, water, and ATP (the currency of energy in ce...
SS
Answered by Shivani S. • Biology tutor
6266 Views

how would you expand quadratic factors

Using the crab method draw lines from each term in the first bracket to the terms in the next bracket only once ensuring the lines do not crossover. A crab like claw should appear, add terms of the same powe...
RP
Answered by Ricken P. • Maths tutor
6100 Views

y is inversely proportional to d2 when d = 10, y = 4 d is directly proportional to x2 when x = 2, d = 24 Find a formula for y in terms of x. Give your answer in its simplest form.

y=k/d 2 substituting:4=k/10 2 4=k/100 400=k d=nx 2 substituting:24=n x 2 2 24=4n n=6 Eq1:y=400/d 2 Eq2:d=6x 2 y=400/(6x 2 ) y=400/36x 4 y=200/13x 4
AI
Answered by Abi I. • Maths tutor
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