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f(x) = 2x3 – 5x2 + ax + 18 where a is a constant. Given that (x – 3) is a factor of f(x), (a) show that a = – 9 (2) (b) factorise f(x) completely. (4) Given that g(y) = 2(33y ) – 5(32y ) – 9(3y ) + 18 (c) find the values of y that satisfy g(y) = 0, givi

a) 54-45+3a+18=0 3a+27=0 3a=-27 and thus a=-9b) 2x^3 – 5x^2 -9x + 18 = (x-3) (2x^2 +bx-6)to find b ; collect the x^2 terms so bx^2-6x^2=-5x^2 and thus b=1c) when comparing f(y) and f(x) we see ...

Answered by Akrit K. • Maths tutor

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How do I plan an essay effectively?

Read the question carefully, you might want to underline or highlight key words so as to ensure you keep these in mind when planning. You will need to consider which textual material to draw upon and what...

Answered by Miranda V. • English Literature tutor

3346 Views

Shopping - La compra (How much can Victor buy with 10€ budget in order to get vegetables & and fruits?)

Unos amigos vegetarianos de Victor van a ir a comer a su casa. Victor es estudiante y su presupuesto es bajo. Tan solo cuenta con 10€. Va a preparar unas verduras a la plancha y una macedonia de postre.

Answered by Victor A. • Spanish tutor

2670 Views

What is protein synthesis and how does it work?

Protein synthesis is the process in which proteins are produced within cells, from the DNA in the cell nucleus. It is divided into two steps: transcription and translation.
Transcription is when the ...

Answered by Nicole C. • Biology tutor

4076 Views