Math, asked by Praveen12347, 1 year ago

if a=2 and b =5,the value of the expression 2a-(3a+4b-(2a-b)+5a-7b)is

Answers

Answered by pragya9052

2×2-(3×2+4×5)-(2×2-5)+5×2-7×5

4-6+20-4-5+10-35

= -16

Praveen12347: i think it is not a correct answer

pragya9052: then u can say the correct one

Praveen12347: okay

Praveen12347: the given expression is simplified as 2(b-2a)

Praveen12347: the given expression is simplified as 2(b-2a)=2(5-4)=2

Praveen12347: therefore the answer is 2

anshikakesari: u will done a mistake

pragya9052: hiii

Praveen12347: hi

Answered by anshikakesari

.a =2

b =5

= 2a-(3a+ 4b -(2a-b) +5a-7b)

= 2(2)-[3(2)+4(5) - [2(2)-(5)] +5(2) -7(5)]

=4 -[6 +20 -(4-5) +10 -35]

=4 -[ 6+20 -4 +5 +10 -35]

= 4 -(41 -39)

=4 -2

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