Question

1,(2x + 3 ) ²

2, ( 3x + 2y )²

3,(3a -1 )²

4, (a - 2 )²

5, ( 1 - 5a ) ²

6, ( x - 4 ) ³

7,( x² - 2y )²

8, ( 5x² - 2 ) ( 5x² + 2 )

9, (2a² - 7 )(2a² + 7 )

10, ( x - 1 )(x² + x +1 )

11,( x³ - 2 ) (x⁶ + 2x³ +4 )

12, ( 3x + 2 ) (9x² - 6x + 4)

13, ( x² + 3 ) (x⁴-3x²+9)

Answer 1

1,(2x + 3 ) \(^{^{ }2}\)=\(\left(2x\right)^2+2.2x.3+3^2\)

=\(4x^2+12x+9\)

2, ( 3x + 2y )\(^2=\left(3x\right)^2+2.3x.2y+\left(2y\right)^2\)

=\(9x^2+12xy+4y^2\)

3,(3a -1 )\(^2=\left(3a\right)^2-2.3a.1+1^2\)

\(=9a^2-6a+1\)

4, (a - 2 )\(^2=a^2-2.a.2+2^2\)

=\(a^2-4a+4\)

5, ( 1 - 5a )\(^2=1^2-2.1.5a+\left(5a\right)^2\)

=\(1-10a+25a\)

6, ( x - 4 )\(^3=x^3-3x^24+3x4^2-4^3\)

=\(x^3-12x^2+48x-64\)