Question

$( \: 5x \: - 3y \: ) \: \times (3x + 4y)$
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Answer 1

Answer:

15x^2-11xy-12y^2

Step-by-step explanation:

(5x-3y)  (3x+4y)

=5x*(3x+4y) -3y(3x+4y)

=[(5x*3x)+(5x*4y)]-[(3y*3x)+(3y*4y)]

=(15x^2+20xy)-(9xy+12y^2)

=15x^2+20xy-9xy-12y^2

=15x^2-11xy-12y^2

('^' means 'to the power of')