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How do you factorise a quadratic with a co-efficient in front of the x^2 - e.g: 3x^2 + 14x + 8

Ok so to factorise a quadratic with a co-efficient in front of the x^2 you need to follow a couple of steps: Step 1 - multiple the co-efficient by the number at the end of the expression - e.g. 3^8 = 24 S...

NK
Answered by Nathaniel K. • Maths tutor
3449 Views

Show, using the focus-directrix property for an ellipse, that PS +PS'=2a where P is a point on the ellipse and S and S' are the two foci.

The focus diretrix property for an ellipse is PS/PD=e. Now this is also the case for the other directrix and focus, so PS'/PD'=e. Now we can rearrange these equations to find a formula for PS +PS', PS +PS...

DL
10226 Views

A phone is knocked off a table 800cm of the ground. If the phone is 650g a) what is the gravational potential of the phone? b)what speed will the phone hit the floor at? c)How long will it take for the phone to hit the floor?

UNITS - SI UNITS: 800cm --> 0.8m  0.65kg

a) Ep= mg(change) height

Ep=0.65kg * 9.81m/s2 * 0.80m

Ep=5.10 Joules (J)

b) Gravational Potential = Kinetic energy

JJ
Answered by Julia J. • Physics tutor
1547 Views

Name a product of photosynthesis?

Glucose

Oxygen

OE
2386 Views

Find the exact solutions for 4 − x^2 = |2x − 1|

x=-1

x=-1+60.5

SV
Answered by Shroya V. • Maths tutor
5661 Views

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