S.chand publication New Learning Composite mathematics solution of class 8 Chapter 5 Algebraic Expressions Exercise 5C

 Exercise 5C

Q1 | Ex-5C | Class 8 |Algebraic Expressions | S.chand  | New Learning Composite mathematics | Chapter 5  | myhelper

Question 1

Find the Product:

(a) -4(2y + 7)

Sol : -8y-28


(b) -1(3x – y)

Sol : -3x+y


(c) x2(x – 4)

Sol : x3-4x2


(d) 3y2(5y3 + 1)

Sol : 15y5+3y2


(e) -2p(p2 – p -7)

Sol : -2p3+2p2+14p


(f) (x2 – x – 10) (-3x)

Sol : -3x3+3x2+30x



Q2 | Ex-5C | Class 8 |Algebraic Expressions | S.chand  | New Learning Composite mathematics | Chapter 5  | myhelper

OPEN IN YOUTUBE

Question 2

(a) (6 – 5m – m7) (-2m2)

Sol : 

=-12m2+10m3+2m9


(b) y4 (y7 -3y2 + 6)

Sol : 

=y11-3y6+6y4


(c) (3 – q + 4q3) (-q4)

Sol : 

=-3q4+q5-4q7


(d) -2x2 (3x2 – 4xy + y2)

Sol : 

=-6x4+8x3y-2x2y2


(e) 5a3b2(7 –  2ab4 + 3a2b5)

Sol : 

=35a3b2-10a4b6+15a5b7

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