Top answers

2x^2+21x=-40

2x 2 +21x+40=0factors of 40=1&40, 2&20, 4&10, 5&85 & 8 are correct factors as 5 + 2*8 = 21(2x+5)(x+8)=0So, x = -8 & -2.5
NM
Answered by Nirav M. • Maths tutor
3523 Views

What is the ' present subjunctive' tense and when should it be used?

The subjunctive is a form of a verb that is used to show a level of feeling , or doubt ; it is commonly used to discuss whether something will happen or not. In French, the subjective is also used when a sen...
EH
Answered by Elizabeth H. • French tutor
1895 Views

Describe how the control rods in a nuclear reactor are used to regulate nuclear fission in a nuclear reactor.

A control rod is a device that can be used to absorb neutrons released from nuclear fission. They can be used to slow down or completely stop a reaction by lowering them or raising them into the reactor cham...
LJ
Answered by Laurie J. • Physics tutor
3432 Views

Translate the following sentence: "C’est mon rêve d’avoir une salle de cinéma et une bibliothèque."

It's my dream to own a cinema and a library.
HD
Answered by Hugues D. • French tutor
2259 Views

Explain the processes that occur to form an arch along a coastal landscape.

In order for an arch to form erosional processes must take place to firstly form a crack within the cliff face. In most cases for this crack to form, hydraulic action takes place. This involves water enterin...
CD
Answered by Ciara D. • Geography tutor
3366 Views