Class 7
subject : Maths (Mathematics)
Book : Viva class 7
Chapter : Algebraic expressions
Exercise : 6.3
Question : 2. If x = -1, find the value of the following.
(d). x² + y² - 2xy
mansi kamble if you are watching this please answer you really helped me so much ( ◜‿◝ )♡
and please don't answer any kinds of duidkfffif,or something else if you don't know the answer please just ignore
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Answer:
Step-by-step explanation:
x= -1
(-1) square + y square - 2(-1)y
= 1 + y square -(-2y)
= 1+y square + 2y
Answered by
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x = (-1)
Equation= x² + y² - 2xy
= x² + y² - 2xy
= (-1)² + y² - 2(-1)y
= y² + 2y + 1
= y² + y + y + 1 = 0
= y ( y + 1 ) = 0
= ( y + 1 ) = 0
= y + 1 = 0
= y = -1
therefore the value of y is also - 1 .
Samruddhi I had solve in two ways .
see one method I had type .
And second method I had sent picture .
The method that I had type is systematic method . Because as you know teacher need explanation .
And second [ picture] method for understanding .
And sorry for late . Due to online lecture and study .
Samruddhi your Math book is of viva education .
If your English grammar book is Viva smart score. please tell me . because my English grammar book is also published by Viva so please tell me when you ask your next Question .
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