Math, asked by Anonymous, 1 year ago

On dividing polinomial 2x³+ax²+3x-5 by x-1 , the remainder is 7.Find the value of a.

Answers

Answered by richigupta

Here is your solution,

x-1 = 0

x = 1

p(x) = 2x³ + ax² + 3x - 5

p(1) = 2×(1)³ + a×(1)² + 3×1 - 5

= 2×1 + a + 3 - 5

= 2+a+3-5

= 0 + a =7

a = 7-0

a = 7

So, the value of a is 7

Hope it helped..................

Anonymous: yes

richigupta: ya then the method which I have told is correct
I've passed 9th last year only.

Anonymous: ok

Anonymous: I am actually new in this brainly and class 9 so I needed help

richigupta: u can ask ur doubt whenever u want

Anonymous: But how can I ask you

Anonymous: anyway thanks alot

richigupta: u can ask the question through message

Anonymous: May I ask another question

richigupta: yes

Answered by Renewables

2x³+ax²+3x-5÷x-1=7
2x³+ax²+3x÷x=7+5+1
x(2x²+ax+3x÷1)=13
2x²+ax+3x÷1=13x
x(2x+a+3÷1)=13x
x(a+3)=13x-2x
x(a+3)=11x
a+3=11x²
a/x²=11-3
a/x²=8
a=8x²
I hope it helps

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