Multiply:
$(7x + y)$ by $(x + 5y)$

AcademicMathematicsNCERTClass 8

To do:

We have to multiply $(7x + y)$ by $(x + 5y)$

Solution:

We know that,

$(a+b)\times(c+d)=a(c+d)+b(c+d)$

Therefore,

$(7x + y)\times(x + 5y)=7x (x + 5y) + y (x + 5y)$

$= 7x^2 + 35xy + xy + 5y^2$

$=7x^2 + 36xy + 5y^2$

raja
Updated on 10-Oct-2022 13:19:30

Advertisements