Home
Class 7
MATHS
If A=3x^(2)-2x+1 B=x^(2)-4x+6 C=-2x^...

If `A=3x^(2)-2x+1`
`B=x^(2)-4x+6`
`C=-2x^(2)+5`, Find `A-2B+3C`

Text Solution

Verified by Experts

The correct Answer is:
`-5x^(2)+6x+4`
Promotional Banner

Topper's Solved these Questions

  • ALGEBRAIC EXPRESSIONS

    NAND LAL PUBLICATION|Exercise SAMPLE PAPER FOR PRACTICE (STATE WHETHER TRUE OR FALSE) |6 Videos
  • EXPONENTS AND POWERS

    NAND LAL PUBLICATION|Exercise SAMPLE PAPER FOR PRACTICE |8 Videos

Similar Questions

Explore conceptually related problems

Answer the multiple choice question Which of the following algebraic expression is not a polynomial. a. (4x ^(2))/(2x) + 3x - 7 b. 3x xx (1)/(x) + 5 c. x ^(2) - 2x +1 d. None

(1 + x)^(n) = C_(0) + C_(1) x + C_(2) x^(2) + C_(3) x^(3) + … + C_(n) x^(n) , prove that C_(0) - 2C_(1) + 3C_(2) - 4C_(3) + … + (-1)^(n) (n+1) C_(n) = 0

If A=[(8,0),(4,-2),(3,6)] and B=[(2,-2),(4,2),(-5,6)] then find the matrix X such that 2A+3X=5B

Events A, B, C are mutually exclusive events such that P (A) = (3x+1)/3, P (B) =(1-x)/4 and P (C) =(1-2x)/2 . The set of possible values of x are in the interval :

Which of the following function(s) is/are transcendental? a. f(x)=5sin(sqrt(x)) b. f(x)=(2sin3x)/(x^(2)+2x-1) c. f(x)=sqrt(x^(2)+2x+1) d. f(x)=(x^(2)+3)*2^(x)

If (1 + x)^(n) = C_(0) + C_(1)x + C_(2) x^(2) + C_(3) x^(3) + …+ C_(n) x^(n) prove that (C_(0))/(1) + (C_(2))/(3) + (C_(4))/(5) + ...= (2^(n))/(n+1) .

Find x , if (2^(x - 1) . 2^(4x + 2))/2^(3x - 3) = 64

If a,b b,c, and c,a are the roots of x^(2)-4x+3=0,x^(2)-8x+15=0 and x^(2)-6x+5=0, [{:(a^(2),+c^(2),a^(2)+b^(2)),(b^(2),+c^(2),a^(2)+c^(2)):}]+[{:(2ac,-2ab),(-2bc,-2ac):}]

If (1 + x)^(n) = C_(0) + C_(1) x + C_(2) x^(2) + C_(3)x^(3) + ...+ C_(n)x^(n) , prove that (C_(1))/(2) + (C_(3))/(4) + (C_(5))/(6) + …= (2^(n)-1)/(n+1) .

From the sum of 5x^(2)-3x+7 and 2x-8x^(2)+5 subtract the sum of 13x+9x^(2)+6 and x^(2)-4x+1