Question

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Exercitiul 6!​

Answer 1

$a) {x}^{2} - 1 = (x - 1)(x + 1)$

$b) {x}^{2} - 4 = (x - 2)(x + 2)$

$c) {x}^{2} - 9 = (x - 3)(x + 3)$

$d) {x}^{2} - 16 = (x - 4)(x + 4)$

$e) {x}^{2} - 25 = (x - 5)(x + 5)$

$f) {x}^{2} - 36 = (x - 6)(x + 6)$

$g) {x}^{2} - 49 = (x - 7)(x + 7)$

$h) {x}^{2} - 64 = (x - 8)(x + 8)$

$i) {x}^{2} - 81 = (x - 9)(x + 9)$

Answer 2

Răspuns:

a)x²-1=(x-1)(x+1)

d)x²-16=(x-4)(x+4)

g)x²-49=(x-7)(x+7)

b)x²-4=(x-2)(x+2)

e)x²-25=(x-5)(x+5)

h)x²-64=(x-8)(x+8)

c)x²-9=(x-3)(x+3)

f)x²-36=(x-6)(x+6)

i)x²-81=(x-9)(x+9)

Explicație pas cu pas: