Question

Find 5•1×5•2 using the formula (x+a) ( x+b )​

Answer 1

Answer:

42

Step-by-step explanation:

According to the formula

(x+a) (x+b)

(5+1) (5+2) = 5(5+2) + 1(5+2)

= 25 + 10 + 5 + 2

= 42

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Answer 2

Answer:

42

Step-by-step explanation:

(x+a)(x+b)=x2+(a+b)x+ab

(5+1)(5+2)=5^2+(1+2)5+1*2

25+15+2

42