Vom folosi formulele de calcul prescurtat:
(a±b)²=a²±2ab+b²
a²-b²=(a-b)(a+b)
Coloana A:
(x+3)²
x²-9
6x²+18x
9x²+ 12x+4
(4-x)²
(5x+6)(5x-6)
Coloana B:
(x+3)(x − 3)
x² + 6x +9
(3x + 2)²
9x² + 12x+4
25x² - 36
(4- x)²
6x(x + 3)
16-8x+x²
Vom lua coloana A si vom efectua calculele apoi rezultatele le gasim in coloana B si le asociem
(x+3)² =x²+6x+9
x²-9=(x-3)(x+3)
6x²+18x=6x(x+3)
9x²+ 12x+4=(3x+2)²
(4-x)² =16-8x+x²
(5x+6)(5x-6)=25x²-36
Un exercitiu asemanator cu formule de calcul prescurtat gasesti aici: https://brainly.ro/tema/595708
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