Jawabanmu

2014-08-25T18:19:47+07:00
X-y=15     |x3| ==>3x-3y=45
3x-2y=62  |x1| ==>3x-2y=62
________________________-
                                y=17
x-17=15
x=15+17 = 32

x^2=32.32=1024
y^2 = 17.17 = 289




bener kok kayaknya
Eh iya... bener.. Terus kenapa beda ya..
-2b + (-2b) = -4b kak ^^ mungkin disitu bedanya.. ^^ emang perlu ketelitian, saya juga sering nggak teliti hehe.. ^^
Oh iya.. Sebenarnya aku juga belum belajar materi ini ^.^ cuman aku suka baca jadi ya .. begitulah tau hehe Thanks
hehehe, ntar juga ketemu di SMP ^^
oke sama2..
2014-08-25T18:22:29+07:00

a - b = 15
3a - 2b = 62
a² + b² = ?

Eliminasi b

a - b = 15                2a - 2b = 30                            2a - 2b = 30  
3a - 2b = 62            3a - 2b = 62                            3a - 2b = 62
                               -------------------- +  ---> EDIT    ------------------ -
                                  5a = 92                                 -a = -32
                                    a = 18,4                               a  = 32

a - b = 15                                                                  a-b = 15
18,4 - b = 15                                                            32 - b = 15
3,4 = b                                                                        b = 17

a² + b² = (18,4)² + (3,4)² = 338,56 - 11,56 = 327         a² + b² = (32)² + (17)²
                                                                                     1024 + 289 = 1313