Question

4.
(x + 4)^2 - (x - 5)^2 = 9


please solve this question​

Answer 1

Answer:

a² - b² = (a + b)(a-b)

(x + 4)² - (x - 5)² = 9

[x+4+(x-5)] [x+4-(x-5)] = 9

⇒(x+4+x-5)(x+4-x+5) = 9

=(2x -1)(9) = 9

⇒2x - 1 = 1

⇒x = 1

Answer 2

Answer:x^2+16+8x-x^2-25+10x=9

Answer:x^2+16+8x-x^2-25+10x=918x-9=9

Answer:x^2+16+8x-x^2-25+10x=918x-9=918x=18x=18/18=1