Question

81-49x? step by step​

Answer 1

Answer:

130

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Step-by-step explanation:

81-49x=0

-49x=81

x=81+49

X= 130

Answer 2

Answer:

Answer

Step-by-step explanation:

Given,

81- 49x²

81 can be written as 9².

49x²can be written as (7x)² ( 7x×7x= 49x²).

(9)²- (7x)²

This is in the form of x²-y².

(x²-y² = (x+y)(x-y) ).

Here,

x=9 and y= 7x.

so,this can be written as,

(9+7x)(9-7x).

Therefore,

81-7x² = (9+7x)(9-7x).