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

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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

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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