EXERCISE

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Subject Experts Mathematics Solutions for EXERCISE

Simple step-by-step solutions to EXERCISE questions of Algebraic Expressions from Foundation Course Mathematics. Also get 3D topic explainers, cheat sheets, and unlimited doubts solving on EMBIBE.

Questions from EXERCISE with Hints & Solutions

MEDIUM
7th CBSE
IMPORTANT

Subtract (2a-3b+4c) from the sum of a+3b-4c,4a-b+9c, and (-2b+3c-a).

MEDIUM
7th CBSE
IMPORTANT

Rohan spends x daily and saves y per week. What is his income in 3 weeks?

MEDIUM
7th CBSE
IMPORTANT

In this section, each question has two matching lists. Choices for the correct combination of elements from List-I and List-II are given as options (a), (b), (c) and (d) out of which one is correct.
Match the following:

        List-I                  List-II

(P) Add x5+8x3-7x2+12 and -3x3+10x2+8

(1) -x3-3x2+3x+2

(Q) Subtract 2x2y+4x2y2+3x2y from 5x2y+7xy2

(2) -x3+x2+3x-6

(R) Subtract 2x3+2x2-4x-4 from x3-x2-x-2

(3)x5+5x3+3x2+20

(S) Add x3-x2-x-2 and 2x2-2x3+4x-4

(4) 3x2y+4xy2-4x2y2

MEDIUM
7th CBSE
IMPORTANT

In this section, each question has two matching lists. Choices for the correct combination of elements from List-I and List-II are given as options (a), (b), (c) and (d) out of which one is correct.
Match the following:

List-I List-II

(P) x2+5x3+3+5 at x=2

(1) 0

(Q) 2x3+2x2-4x-4 at x=-2

(2) 104

(R) 

-103xy3×65x3y atx=5, y=3

(3) 13

(S) x3-x2-x-2 at x=3

(4) -4

EASY
7th CBSE
IMPORTANT

If A=3x2+2x-7 and B=7x3-3x+4, then find 2A+3B.

MEDIUM
7th CBSE
IMPORTANT

Simplify: 2x+3y-3x+4y+7x+3y+x+2y and find value for x=2, y=1.

MEDIUM
7th CBSE
IMPORTANT

Find the sum of 24x2-2x3 and -3xy2+y3 and evaluate their sum at x=12 and y=2.

MEDIUM
7th CBSE
IMPORTANT

The sum of the values of the expression 2x2-2x+2 when x=-1 and x=1 is _____.