Resposta:
2) ( x +2) ²= x²+ 2.x.2+ 2² = x² + 4x + 4
b) ( 2x+1)² = 2x² + 2.2x.1 + 1²
4x²+ 4x +1
c) ( x+4)²
x²+ 2.x.4+4²
x²+ 8x + 16
d) ( x-5)² = x²- 2.x5+5²
x²- 10x +25
e) ( 3x-2)²
3x²- 2.3x.2+ 2²
9x²- 6x+ 4
f) (x² -1)²
= x⁴- 2.x².1+ 1
x⁴- 2x²+1
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Resposta:
2) ( x +2) ²= x²+ 2.x.2+ 2² = x² + 4x + 4
b) ( 2x+1)² = 2x² + 2.2x.1 + 1²
4x²+ 4x +1
c) ( x+4)²
x²+ 2.x.4+4²
x²+ 8x + 16
d) ( x-5)² = x²- 2.x5+5²
x²- 10x +25
e) ( 3x-2)²
3x²- 2.3x.2+ 2²
9x²- 6x+ 4
f) (x² -1)²
= x⁴- 2.x².1+ 1
x⁴- 2x²+1