Find the value of following monomials, if x =1.(i) -x(ii) 4x(iii) -2x2

1.	Find the value of following monomials, if x =1.(i) -x(ii) 4x(iii) -2x2
Answer» i) If x = 1 ⇒ – x = – (1)= – 1 ii) If x = 1 ⇒ 4x = 4 x 1 = 4 iii) If x= 1 ⇒ – 2x² = – 2(1)² = – 2 × 1= – 2 1. -x = -1 2. 4x = 4(-1) = -4 3. -2x² = -2(-1)² =-2(1) = -2

Answer»

i) If x = 1 ⇒ – x = – (1)= – 1

ii) If x = 1 ⇒ 4x = 4 x 1 = 4

iii) If x= 1 ⇒ – 2x² = – 2(1)² = – 2 × 1= – 2

1. -x = -1

2. 4x = 4(-1)

= -4

3. -2x² = -2(-1)²

=-2(1)

= -2

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