Question

1. Find the value of: (-5° X (-1)" x 2*
2. Express in a single exponent: (2) ** (2) *
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Answer 1

Answer:

Given, x−x1=5

Squaring both the sides,

⇒(x−x1)2=52

⇒x2+x21−2(x)(x1)=25

⇒x2+x21=25+2

⇒x2+x21=27

Now,

x3−x31

=(x−x1)[(x)2+(x1)2+(x)(x1)]

=5(27+1)

=140

Answer 2

Answer:

-ve and -ve give +ve on multiplication.

+10

8

Step-by-step explanation:

-ve and -ve give +ve on multiplication.