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Solve x^2 + 10x - 3 = 0

completing the square (x+5) 2 -25 -3 =0 (x+5) 2 -28 = 0 (x+5) 2 = 28 x= ±2√7 -5
IH
Answered by Isabelle H. • Maths tutor
3637 Views

How are capillaries adapted for their function within the body?

Capillaries have walls only one endothelial cell thick, meaning their walls are very thin. This makes them well adapted for gas exchange, as substances only have to diffuse over a short distance. Additionall...
LC
Answered by Leena C. • Biology tutor
63567 Views

How do you factorize a quadratic equation with all positive numbers?

The easiest way to approach this is by trying to find two numbers which add up to the x coefficient (the number attached before the x) and multiply to the constant (the number on its own). For example...x 2 ...
CB
Answered by Charlotte B. • Maths tutor
3371 Views

How does Virgil use metaphor to convey emotion?

Possible things to consider for Dido:language of heat/flamescomparisons with figures from mythology (Bacchant)similes E.g. Dido compared to a wounded deer Comparisons with Aeneas:oak tree simile to show lack...
JW
Answered by Jess W. • Latin tutor
2413 Views

Work out the integer values that satisfy: x^2−7 x+ 11<0

It's easier if we first visualise the function on a graph, then we can see in which regions it is negative. From there we can see which integer values lie in this region. A positive quadratic function has th...
JP
Answered by Jamie P. • Maths tutor
9131 Views