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Solve (x+10)(x-16)=0

x+10=0x= -10x-16=0x= 16

ST
Answered by Sophie T. Maths tutor
3136 Views

(x+3)(x-4)(x+5) is identical to x^3 +ax^2 -17x+b. Find the value of a and the value of b.

Multiplying out the first two brackets gives (x^2-x-12)(x+5). Multiplying the remaining brackets gives x^3 + 4x^2 -17x - 60.

a = 4b = 60

AE
Answered by Aeron E. Maths tutor
8247 Views

Solve the simultaneous equations : x ^2+2y=9, y=x+3 to find solutions for x and y.

We must use the substitution method for this question because the first equation is a quadratic. Take the more simple equation (the second one), and use that to substitute the value for y in to the first ...

CR
Answered by Callum R. Maths tutor
3313 Views

How to I approach an unseen text/poem

To any student who is required to analyse an unseen text in an exam setting, I would advise them to a set of techniques to notice when annotating the poem which would allow them to uncover literary techni...

DG
Answered by Dulcie G. English tutor
2890 Views

How do white blood cells respond to infections?

The white blood cells detect the foreign antigens on the cells surface. They then rapidly produce antibodies which match the antigens and attach onto them. This allows other white blood cells to engulf th...

OD
Answered by Olivia D. Biology tutor
3686 Views

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