ꯀꯔꯤꯒꯨꯝꯕꯥ $a + b = 7$ ꯑꯃꯁꯨꯡ $a - b = 3$ ꯑꯣꯏꯔꯕꯗꯤ, $a^2 - b^2$ ꯍꯥꯌꯕꯁꯤ ꯀꯔꯤ…

Question

ꯀꯔꯤꯒꯨꯝꯕꯥ $a + b = 7$ ꯑꯃꯁꯨꯡ $a - b = 3$ ꯑꯣꯏꯔꯕꯗꯤ, $a^2 - b^2$ ꯍꯥꯌꯕꯁꯤ ꯀꯔꯤꯅꯣ?

Accepted Answer

C. $21$

ꯗꯤꯐꯦꯟꯁ-ꯑꯣꯐ-ꯁ꯭ꯀꯣꯌꯥꯔ ꯑꯥꯏꯗꯦꯟꯇꯤꯇꯤ $a^2 - b^2 = (a+b)(a-b) = 7 	imes 3 = 21$ ꯁꯤꯖꯤꯟꯅꯧ꯫

Answer

$14$

Answer

$10$

Answer

$28$

ꯀꯔꯤꯒꯨꯝꯕꯥ $a + b = 7$ ꯑꯃꯁꯨꯡ $a - b = 3$ ꯑꯣꯏꯔꯕꯗꯤ, $a^2 - b^2$ ꯍꯥꯌꯕꯁꯤ ꯀꯔꯤꯅꯣ?