Answer:
1. C. 6x²-15x
3x(2x-5)
=6x²-15x
2. A. x²+4xy+4y2
(x+2y)²
=x²+4xy+4y²
3. D. x²-x-6
(x-3)(x+2)
x²+2x-3x-6
=x²-x-6
4. B. 3x²+11xy+6y²
(3x+2y)(x+3y)
3x²+9xy+2xy+6y²
= 3x²+11xy+6y²
5. E. x²-16
(x-4)(x+4)
x²+4x-4x-16
= x²-16
:
1. C
2. A
3. D
4. B
5. E
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Answers & Comments
Answer:
1. C. 6x²-15x
3x(2x-5)
=6x²-15x
2. A. x²+4xy+4y2
(x+2y)²
=x²+4xy+4y²
3. D. x²-x-6
(x-3)(x+2)
x²+2x-3x-6
=x²-x-6
4. B. 3x²+11xy+6y²
(3x+2y)(x+3y)
3x²+9xy+2xy+6y²
= 3x²+11xy+6y²
5. E. x²-16
(x-4)(x+4)
x²+4x-4x-16
= x²-16
:
1. C
2. A
3. D
4. B
5. E