Question

va rog mult acest ex am nevoieeee​

Answer 1

Răspuns:

Explicație pas cu pas:

2(4√7+3√7)+3(3√2+2√2)-3(5√2+5√7)=14√7+15√2-15√2-15√7=-√7

Answer 2

  2(2$\sqrt{28}$+$\sqrt{63}$)+3($\sqrt{18}$+$\sqrt{8}$)+3($\sqrt{50}$+$\sqrt{175}$)

2(4$\sqrt{7}$+3$\sqrt{7}$)+3(3$\sqrt2}$+2$\sqrt{2}$)-3(5$\sqrt{2}$+5$\sqrt{7}$)=

=2*7$\sqrt{7}$+3*5$\sqrt{2}$-15$\sqrt{2}$-15$\sqrt{7}$=

=14$\sqrt{7}$+15$\sqrt{2}$-15$\sqrt{2}$-15$\sqrt{7}$=

=14$\sqrt{7}$-15$\sqrt{7}$=

= -$\sqrt{7}$