Question

(×+5)(×-3) how to solve this using a formula

Answer 1

Answer:

(x+a)(x+b)=x²+(a+b)x+ab

(x+5)(x-3)=x²+(5-3)x+5*-3

=x²+2x-15

Hope it helps u......

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Answer 2

Answer:

(x+5)(X-3)

x2-3x+5x-15

x2+2x-15

Step-by-step explanation:

(x2 is x power 2)

First no. of first bracket get multiplies with the both no. of second brackets. And the second no. gets multiplies with the both no. of second bracket.

MOST REMEMBER THING is-

- - = +    (MINUS MINUS BECOMES PLUS)

- + = -     ( MINUS PLUS BECOMES MINUS)

+ - = -      (PLUS MINUS BECOMES MINUS)

+ + = +    ( PLUS PLUS BECOMES PLUS)