Question

ALGEBRA
(7X^2Y-3Z^2) (X+Y+Z); POWER X=1 Y=1 Z=-1 simplify the following and verify the result for the given values simplify the following and verify the results ​

Answer 1

Answer:

7x^2y-3z^2)(x+y+z)

value of x=1, y=1, z=-1

(7^2-(-3)^2)(1+1+(-1))

49-(9)(1)

49-9

40

hope it helps

Step-by-step explanation:

Answer 2

Answer:

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R.D. Sharma Solutions»R.D. Sharma Class 7 Solutions»Chapter 7 Algebraic Expressions»Algebraic Expressions Exercise 7.2

Chapter 7: Algebraic Expressions Exercise – 7.2

Question: 1

Add the following:

(i) 3x and 7x

(ii) -5xy and 9xy

Solution:

We have

(i) 3x + 7x = (3 + 7) x = 10x

(ii) -5xy + 9xy = (-5 + 9)xy = 4xy

Question: 2

Simplify each of the following:

(i) 7x3y +9yx3

(ii) 12a2b + 3ba2

Solution:

Simplifying the given expressions, we have

(i) 7x3y + 9yx3 = (7 + 9)x3y = 16x3y

(ii) 12a2b + 3ba2 = (12 + 3)a2b =15a2b