factorise the following (2 to 10) expression:
3.(i) 20x^2-45y^2
Answers
Answered by
2
Step-by-step explanation:
20x^2-45y^2
=5((2x)^2-(3y)^2)
=5(2x-3y)(2x+3y)
Answered by
1
Answer:
20x²-45y²
= 5(4x²-9y²)
= 5[(2x)²-(3y)²]
= 5(2x+3y)(2x-3y)
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