Question

Alquém me ajuda por favor !!!!​

Answer 1

Resposta:

Explicação passo-a-passo:

1.

• $l^{2}=100\\l^{2}-100 = 0$
• a = 1 ; b = 0; c = -100
• Incompleta.

2.

• $n\cdot(n+1) =42\\n^{2}+n-42=0$
• a = 1; b = 1; c = -42
• Completa.

3.

• $n\cdot(n+2)=48\\n^{2}+2n-48=0$
• a = 1; b = 2; c = -48
• Completa.

4.

• $n\cdot(n+2) = 35\\n^{2}+2n-35=0$
• a = 1; b = 2; c = -35
• Completa.

5.

• $x^{2}-x=x^{4}\\x^{2}-x-x^{4} = 0$
• ()

6.

• $(3x)^{2} = (x+2)\cdot(x+7)\\9x^{2} = x^{2}+7x+2x+14\\9x^{2} = x^{2}+9x+14\\9x^{2}-x^{2}-9x-14=0\\8x^{2}-9x-14=0$
• a = 8; b = -9; c = -14
• Completa.

7.

• $x\cdot(x+10)=200\\x^{2}+10x-200=0$
• a = 1; b = 10; c = -200
• Completa.

8.

• ()