Question

2y-7)(2y-7)
(3x+5)(3x+5)
31²-25²
(5x+3)(5x+7)
197×203​ I will give 100 points pls answer fast​

Answer 1

Answer:

Step-by-step explanation:

1)

Multiply  equation 1 by 17 and subtract equation 2 * 10 ==>

340 y + 187 x - 72*17 - 340 y - 150 x + 1680 = 0

x = 456/37    y = [ 72 - 11* 456 / 37 ] / 20

2)  

Multiply equation 1 by 2 and subtract equation 2,

98 x + 12 y - 33x - 12 y = 30 - 27  

65 x = 3  

x = 3 / 65

y = [ 15 - 49 * 3/65 ] / 6