Question

Completati adecvat:
a) $a^{2} - 4b^{2} = (a - ...)(a +...)$
b) $9y^{2} - 0,25 x^{2} = (...- 0,5x)(...+ 0,5x)$
c) $3a^{2} - 8 y^{2} = ( \sqrt{3a} -...)( \sqrt{3a} +...)$
d)$\frac{b^{2} }{6} - \frac{1}{7} x^{2} = (...- \frac{x}{\sqrt{7}}) = (...+...)$

Ajutatima va rog repede....
Urggeeeeeeent !

Answer 1

a)a²-4b²=(a-2b)(a+2b)
 
b)9y²-0,25x²=(3y-0,5x)(3y+0,5x)

c)3a²-8y²=(a√3-2y√2)(a√3+2y√2)

d) b²/6-x²/7=(b/√6-x/√7)(b/√6+x/√7)