Math, asked by lubna4, 1 year ago

find the value of the Expression 2x²-3x³+4 at x =2

Answers

Answered by jeet143

2*2^2 - 3*2^3 +4
= 8-24+4 = -12

lubna4: one more question please ......

lubna4: show that the polynomials A=3x+4y-5z , B= X-ray 2y +4z and C=2x+y-3z satisfy the associate law with respect to addition [HINT :A+[B+C] =[A+B] +c]

lubna4: please

jeet143: see u need to find out RHS = LHS

jeet143: SO lets solve LHS

jeet143: first find [B+C] = 3x -y +z now add A

jeet143: AFTER ADDING A U will get = 6X+3Y -4Z

jeet143: now similarly do for RHS ..both will be equal and the law is satisfies

lubna4: u plz solve it step by step

lubna4: please do it

Answered by dhruvjha2001

$2x {}^{2} -3x {}^{3} + 4 = 0$
then
$2(2) {}^{2} - 3(2) {}^{3} \ + 4 = 0$
= 8 -24+4 = 0
= -12

dhruvjha2001: ask a seperate question

dhruvjha2001: and i will answer it

lubna4: the thickness of paper is 0.001578 cm. then expression in standard form?

dhruvjha2001: convert it into metres

lubna4: please you do it full problem

dhruvjha2001: that will be 1578 * 10^-4 m

lubna4: ok

lubna4: thank you

lubna4: okayy.. one more question please

lubna4: show that the polynomials A=3x+4y-5z, B=x-2y+4z and C=2x+y-32 satisfy the associate law with respect to addition [ hint : A+(B+C) =(A+B)+c]

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