1.

Find the product using suitable identities:(x+8) (x-10)

Answer»

• (x+8)(x-10) = ?

=> {x+8}{x-10} = {x+8}{x+(-10)}

a
As we KNOW that ,

(x+a)(x+B) = x^2 +(a+b)x + ab .

here ,

a = 8 & b = 10 .

=> {x+8}{x+(-10)} = x^2 + {8+(-10)}x + 8×(-10)

=> {x+8}{x-10} = x^2 + (-2)x + (-80)

=> {x+8}{x-10} = x^2 -2x - 80 .


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