The value of the coefficient of xy is 0.
<h3>What is an algebraic expression?</h3>It is an expression made of numbers and letters where the numbers are called coefficient.
Analysis:
(ax+by)(cx-dy)
ac -adxy +bcxy -bd
But, ac = 18, ad=bc, bd = 50
18 -xy(bc -ad) - 50
since bc = ad, the coefficient of xy = 0
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Answer:
Given:
Distributive Property tells us that we multiply each term inside the parentheses with the term outside of the parentheses.
Using distributive property on expression 6(y-2) to solve the further expression as:
Simplify:
Subtract the number 12 from 15 we get 3;
therefore, the expression become:
Subtraction property of equality tells us that subtract the same number from both sides of an equation.
Now, subtract 3 from both the sides we get;
Simplify:
Now, divide by 6 on both the sides we get;
On simplify we get;
y =3 Hence Proved!