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1. (x+2)(x+5)
We have a formula (a+b) ( c+d)= ac+ad+bc+bd
(x+2)(x+5)= x^2+5x+2x+10= x^2+7x+10

2. By using same formula,
(x-4)(x+9)= x^2+9x+(-4x)+(-4*9)= x^2+9x-4x+(-36)= x^2+5x-36

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Comment has been deleted
why do not u use the equation editor available while u are answering.. equations look better
X2 means square of x ok?
1.     x2+7x+10
2.     x2+5x-36
stay blessed
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