Calculați pătratele numerelor a,b,c,d: a=84÷6-3 puterea 2
b=105÷7
c=(9²-7²)÷4²
d=14²-16×12 ​

[tex]a=84:6-3^2 \\\\[/tex]

[tex]a= 21 - 9 = 12[/tex]

[tex]a^2 = 12^2 = 144[/tex]

[tex]b=105:7 = 15[/tex]

[tex]b^2 = 15^2 =225[/tex]

[tex]c=(9^2-7^2):4^2[/tex]

[tex]c = (81 - 49 ): 16 =[/tex]

[tex]c = 32: 16 = 2[/tex]

[tex]c^2 = 2^2 = 4[/tex]

[tex]d=14^2-16 \cdot 12[/tex]

[tex]d = 196 - 192 = 4[/tex]

[tex]d^2 = 4^2 = 16[/tex]

Explicație pas cu pas:

[tex]a = 84 : 6 - {3}^{2} = 14 - 9 = 5[/tex]

[tex]{a}^{2} = {5}^{2} = \bf 25 [/tex]

[tex]b = 105 : 7 = 15[/tex]

[tex] {b}^{2} = {15}^{2} = \bf 225 [/tex]

[tex]c = ( {9}^{2} - {7}^{2}) : {4}^{2} = (81 - 49) : 16 = 32 : 16 = 2[/tex]

[tex] {c}^{2} = {2}^{2} = \bf 4[/tex]

[tex]d = {14}^{2} - 16 \times 12 = 196 - 192 = 4 [/tex]

[tex]{d}^{2} = {4}^{2} = \bf 16 [/tex]