Question

a)(x + 2)2

b)(5x + 3)2


​

Answer 1

a)(x + 2)2 = x² +2.x.2+2² = x² +4x +4

b)(5x+3)2=(5x)²+2.5x.3+3²=25x²+30x+9

Answer 2

Quadrado da soma de dois termos

$\boxed{\boxed{\boxed{\mathsf{{(a+b)}^{2}={a}^{2}+2.a.b+{b}^{2}}}}}$

$\mathsf{a) ~{(x+2)}^{2}={x}^{2}+2.x. 2+{2}^{2}}$

$\boxed{\boxed{\boxed{\mathsf{{(x+2)}^{2}={x}^{2}+4x+4}}}}$

$\mathsf{b)~{(5x+3)}^{2}={(5x)}^{2}+2.5x.3+{3}^{2}}$

$\boxed{\boxed{\boxed{\mathsf{{(5x+4)}^{2}=25{x}^{2}+30x+9}}}}$