find the value by using identity (1) 85 • 98
Answers
Answered by
2
Answer:
(100-15) (100-2)
Apply Identity and solve it
Identity u (x+a) (x+b)= x square +(a+b)x+ab
Answered by
0
Answer:8330
Step-by-step explanation:
= (90-5)(90+8)
= (x+a)(x+b)=x^2+(a+b)x+ab
= (90)^2+(-5+8)90+(-5)(8)
= (8100)+(3)90+(-40)
= 8100+270-40
= 8370-40
= 8330
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