The phrase "are able to undertake" is correct and usable in written English.
It can be used when expressing someone's capability or capacity to take on a task or responsibility.
Example: "Our team members are able to undertake multiple projects simultaneously without compromising quality."
Alternatives: "can take on" or "are capable of undertaking".
"After careful evaluation, the chiefs of staff have advised me that U.K. forces are able to undertake the proposed operation, that there is a compelling military operational justification for doing so, and that it entails a militarily acceptable level of risk for U.K. forces," Mr. Hoon told the House of Commons.
Mr. Blair echoed that in today's broadcast, saying, "The key thing at the moment is to make all the preparations necessary, and to make sure that we are building up the capacity in the region, both the Americans and ourselves -- and that we are able to undertake this mission if it falls to us to do so".
Inventors who can convincingly persuade investors to advance research expenses are given a tool to secure returns to the investment and so are able to undertake their research.
Daly conveys the impression that only a few women are able to undertake the "Journey" (1978) or to achieve "Quintessence" (1998).
Nowadays, HHC centers are able to undertake more technical complex care such as (but not limited to) end-of-life care, chemotherapy and rehabilitation.
We show that the potential for leadership changes is greater for firms that are able to undertake 'aggressive' competitive actions at the time when 'significant' windows of opportunity are open.
Without sufficient advances, many writers will not be able to undertake long, difficult, risky projects.
Yet as of early 2014, not one of the businesses had been able to undertake fortification.
Differences also emerged on the kind of nuclear research Iran will be able to undertake.
For instance, will American soldiers be able to undertake military operations as they see fit, as they do now?
In 2004 Hu Jintao, China's president, said the PLA should be able to undertake "new historic missions".
