Question

5x + 3y -xy if x=1 y=3 and z = -1​

Answer 1

Answer:

11

Step-by-step explanation:

5x + 3y - xy

= 5×1 + 3 × 3 - 1×3

= 5 + 9 - 3

= 11

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Answer 2

Solution :

Here, we have to find the value of 5x + 3y - xy.

It is given that

x = 1

y = 3

z = -1

Substituting these values

>> 5 × 1 + 3 × 3 - 1×3

>> 5 + 9 - 3

>> 11

This is the required answer .

The value of z was redundant here cause there's no such variable in the expression .

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Additional Information -

A few algebraic identities are listed below

$\boxed{\begin{minipage}{7 cm}\boxed{\bigstar\:\:\textbf{\textsf{Algebric\:Identity}}\:\bigstar}\\\\1)\bf\:(A+B)^{2} = A^{2} + 2AB + B^{2}\\\\2)\sf\: (A-B)^{2} = A^{2} - 2AB + B^{2}\\\\3)\bf\: A^{2} - B^{2} = (A+B)(A-B)\\\\4)\sf\: (A+B)^{2} = (A-B)^{2} + 4AB\\\\5)\bf\: (A-B)^{2} = (A+B)^{2} - 4AB\\\\6)\sf\: (A+B)^{3} = A^{3} + 3AB(A+B) + B^{3}\\\\7)\bf\:(A-B)^{3} = A^{3} - 3AB(A-B) + B^{3}\\\\8)\sf\: A^{3} + B^{3} = (A+B)(A^{2} - AB + B^{2})\\\\\end{minipage}}$

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